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- cooking 187
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- unquiet 50
- accommodation 660
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- gray 590
- STRATEGY 71
- Adjective 49
- resign 737
- complaint 648
- Northwest 68
- exasperating 97
- innocent 527
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- Bondage 66
- body 1277
- Unwanted 118
- ballast 89
- coded 104
- probity 209
- bottom 760
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- unlikely 677
- imposing 159
- confusion 775
- box office 186
- Persona 27
- side 549
- atmosphere 822
- catalogue 277
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- banjo 119
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- utmost 621
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- horde 180
- totality 78
- sq. 63
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- desperate 717
- grizzly bear 126
- dine 385
- SWIM 137
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- impressive 610
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- buggery 129
- strikeout 160
- nod 800
- entertain 714
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- tower 1145
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- icon 368
- complete 966
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- bra 176
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- reality 866
- Floozy 65
- evidence 1007
- Bath 330
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- avenue 587
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- alien 396
- Emotion 90
- supine 56
- The process of changing or making changes 186
- bombardment 330
- paradise 516
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- disapproving 231
- eschatology 108
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- Predictable 220
- hacker 119
- hypothesIS 141
- furious 849
- Midway 63
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- blessing 308
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- Answer 164
- Laconic 61
- velvet 608
- Infallible 24
- Disclaim 35
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- Flexible 311
- shareware 105
- bowed 93
- betrayal 286
- downside 189
- cyberterrorism 108
- focal point 214
- Enmity 181
- employee 669
- gangland 198
- unstuck 59
- ta 62
- lay 822
- accordance 507
- suppression 270
- benchmark 233
- mechanic 524
- expression 1343
- honored 68
- notion 1022
- honour 728
- Walk 331
- drawn 158
- despise 732
- Framework 122
- fastball 98
- inclined 209
- expense 1147
- baffle 221
- remedy 1091
- photography 283
- estimate 844
- Begrudge 19
- sepulchre 54
- temptation 596
- fond 607
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- entrepreneur 245
- Knead 46
- target 847
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- conceit 304
- Budding 50
- isomer 53
- warranty 127
- fine 310
- Nickname 96
- CD 117
- thy 55
- futile 310
- Intend 267
- dead 387
- Irrational 329
- chiropodist 120
- doom and gloom 76
- outcome 747
- Correspondence 303
- network 1303
- Wry 105
- the Republican Party 69
- webbing 57
- Thrilled 218
- adhesion 119
- Remaining 174
- waking 57
- Occupy 387
- rub out 72
- jam 680
- Expertise 94
- kid 852
- Instigate 205
- Man 225
- Ethnic 191
- settlor 48
- remark 791
- Composed 192
- diagonal 117
- dell 112
- drunk 938
- output 703
- achievable 92
- Wreak 60
- Drive 366
- Previously 155
- Kebab 56
- blurt 169
- apogee 101
- energetic 310
- extent 1112
- Demerit 26
- nightmarish 143
- dope 260
- deck 711
- saturated 223
- drizzly 123
- Nonchalant 106
- detectable 176
- caution 513
- biometrics 107
- expedient 132
- Clock 20
- Flock 212
- objection 643
- scrubs 62
- quotation 718
- trauma 312
- tupik 47
- sterilize 267
- forwards 126
- willful 53
- affection 786
- contraception 247
- Patient 404
- Once 169
- conscious 547
- refinement 116
- Radical 310
- eventually 538
- lessen 463
- mine 437
- Fiction 183
- Populous 37
- freeze 567
- science 161
- pacemaker 56
- until 210
- frame 894
- surgeon 558
- street 1327
- monthly 1117
- Upgrade 73
- scrawl 233
- speciality 519
- seeing 141
- critical 557
- runoff 200
- Slap 366
- meatball 69
- oven 792
- resort 767
- mislead 747
- Weapon 306
- precise 612
- artificial 711
- ignore 1038
- democratic 496
- patent 330
- fretful 149
- housewarming 157
- puritanism 82
- temporary 618
- algal 108
- She'd 96
- intravenous 104
- Replica 25
- yielding 51
- really 280
- graph 537
- bunt 102
- Scholarship 74
- cleaning lady 106
- latter 516
- curt 139
- internet 570
- bedbug 113
- Destination 268
- burn 734
- procurement 178
- Society 135
- Fiber 72
- freedom fighter 118
- depose 132
- broil 148
- ending 1325
- epidemic 365
- suspense 219
- trained 58
- Coast 257
- gale-force 85
- revivify 54
- Remote 531
- worldwide 517
- feeble 547
- disposed 257
- charter 243
- instantiate 139
- Revitalize 58
- Offspring 254
- enclosure 116
- shatter 266
- frequency 1278
- rejoice 513
- Divert 220
- weave 681
- Capitalize 149
- gadget 154
- dressy 105
- concept 1318
- pebble 466
- rigatoni 59
- wiggle 81
- brewer 160
- Virginity 272
- hence 481
- trollop 52
- mutually 195
- commission 743
- restate 186
- homework 181
- cowpoke 127
- invade 671
- consul 257
- Puff 388
- hod 75
- dot 607
- acrylic 106
- finger 783
- Grateful 233
- board 655
- suntrap 41
- figure 1038
- cub reporter 152
- notebook 468
- parliament 727
- Bottled 67
- Sad 247
- Elocution 99
- Hopeless 163
- cobalt 101
- cliché 225
- stress 1527
- Norse 40
- operator 570
- Attendance 176
- sod 149
- Unintentional 78
- appear 880
- blusher 99
- bombastic 119
- CONTEND 83
- nickname 424
- bug-eyed 94
- sketch 669
- explore 625
- unconsciousness 52
- iodine 120
- grace 556
- sufficiency 119
- contempt 536
- bristle 626
- somebody 99
- Mean 287
- egocentric 150
- behave 1024
- Possession 287
- gaping 97
- sibling 514
- deliberate 475
- Role 2874
- Modality 26
- brace 304
- VARIETY 69
- lorry 529
- refinery 143
- tremendous 596
- titivate 41
- alias 191
- improve 540
- destroy 670
- canary 99
- appendix 228
- powdery 105
- theft 170
- eve 606
- blouse 152
- promotional 113
- Malcontent 64
- probation 266
- recondite 48
- purblind 56
- Hypothesize 10
- omnipresent 336
- gesticulate 410
- videophone 67
- seal 796
- experienced 209
- ethyl alcohol 142
- by the time 37
- patriotism 138
- bar code 127
- feast 637
- unforgivable 59
- aeroplane 701
- daggy 101
- fustian 129
- dominant 239
- downturn 304
- pant 608
- Impressive 208
- dancing 180
- calculated 191
- feed on 141
- oversized 61
- Remorse 70
- robbery 758
- favourable 519
- reconstruction 87
- Slave 72
- enable 529
- cadre 166
- thus 622
- tent 712
- Fart 59
- dickhead 167
- Indictment 281
- vague 1187
- rummage 86
- unnecessary 622
- purity 813
- banana republic 131
- patrimony 79
- sperm 102
- loyalty 898
- Compete 284
- Characteristic 272
- arrange 869
- sledge 435
- manuscript 169
- Girl 149
- erection 135
- shard 75
- Crush 68
- immeasurable 106
- Legislate 80
- woozy 60
- lodger 67
- balky 122
- desolation 141
- stringent 129
- Doctrine 33
- green 245
- Buffet 231
- magnetic 888
- Goodbyes and to say goodbye 104
- fry 613
- Gesture 436
- require 605
- staunch 236
- Combination 386
- nook 89
- knife 771
- annotate 95
- fanny pack 123
- Profound 75
- captive 592
- avoid 757
- entrenched 117
- docile 228
- Injury 479
- overdone 64
- appall 259
- Fairy 78
- calibrate 174
- Group 278
- Engage 243
- Spleen 27
- tidemark 56
- Words used to describe plants and plant parts 20
- explanation 1068
- quieten 68
- attach 845
- Curt 74
- optimal 171
- holler 158
- tx 57
- Sovereignty 262
- elimination 455
- wagon 536
- yourself 84
- Rarely 238
- STORAGE 92
- Suggestive 17
optional
★
adjective 
/ˈɒpʃ(ə)nəl/
/ˈɒpʃ(ə)nəl/ - something that is optional is available or possible if you want it, but you do not have to have it or do it 可选的；非强制的
Add 200 grammes of walnuts (optional). 加200克的胡桃（可选）。
The history course is optional, but English is compulsory. 历史课是选修的，但英语课是必修的。
an optional extra (=something that is available, usually for more money) （通常指需另交费的）额外可选之物 :Remote central locking comes as an optional extra. 遥控中央门锁是可供选择的额外配置。
Synonyms and related wordsAvailable and to be, or to become available: available, public, spare...
derived word
optionally
adverb Synonyms and related words
Available and to be, or to become available: available, public, spare...
adjective
optional adj.
⇨ voluntary 1
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