| 1. | calm | mild | peaceful | placid |
|---|---|---|---|---|
| troubled | agitated | nervous | upset | |
| 2. | candidly | openly | frankly | honestly |
| slyly | secretly | covertly | stealthily | |
| 3. | carefree | breezy, | light-hearted | happy-go-lucky |
| troubled | depressed | miserable | despondent | |
| 4. | cautious | careful | watchful | circumspect |
| reckless | careless | heedless | rash | |
| 5. | centre | middle, | hub, | midpoint, |
| border | boundary, | edge, | fringe, |
| 6. | certain | undeniable, | sure, | evident, |
|---|---|---|---|---|
| uncertain, | doubtful, | dubious, | questionable | |
| 7. | chatty, | talkative, | gabby, | loquacious |
| aloof, | silent, | reserved, | taciturn, | |
| 8. | cheap, | inexpensive, | low-priced, | economical |
| costly, | expensive, | pricey, | dear, | |
| 9. | clean, | pure, | unblemished, | spotless |
| dirty | filthy, | stained, | sloppy | |
| 10. | clear | bright, | luminous | shining |
| murky, | dim, | foggy, | fuzzy |
| 11. | clever, | smart | intelligent, | quick-witted |
|---|---|---|---|---|
| stupid, | dull, | dense | slow | |
| 12. | coarse, | rough, | crude, | unrefined |
| smooth, | polished, | soft, | refined | |
| 13. | cold, | icy, | chilly, | freezing |
| warm, | hot, | boiling, | sizzling | |
| 14. | colossal | big, | large, | huge |
| small | tiny, | minute, | little | |
| 15. | commence, | begin, | start, | emerge |
| conclude, | cease, | close, | complete |
| 16. | common, | normal, | regular, | customary |
|---|---|---|---|---|
| peculiar, | odd, | strange | queer | |
| 17. | cordial, | warm-hearted, | congenial, | affectionate |
| unfriendly, | unpleasant, | cold, | disagreeable | |
| 18. | crazy | insane, | loony, | mad |
| sane, | sensible, | level-headed, | fair-minded | |
| 19. | credible | believable, | plausible, | likely |
| incredible, | unbelievable, | implausible, | unlikely | |
| 20. | curious | inquisitive, | inquiring, | questioning |
| incurious | indifferent, | disinterested, | apathetic |
*Three types of antonyms (gradable, complementary and relational) can be distinguished. Word meanings are context-dependent.