| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | indefinite, uncertain |
| Synonyms: | backward, cautious, diffident, disinclined, doubtful, faltering, halting, hesitant, irresolute, reluctant, timid, undecided, unsure, vacillating, vacillatory, wobbly |
| Antonyms: | certain, conclusive, definite, sure |
| Main Entry: | undeveloped |
| Part of Speech: | adjective |
| Definition: | immature |
| Synonyms: | abortive, backward, behindhand, embryonic, half-baked, ignored, inchoate, incipient, inexperienced, latent, potential, primitive, primordial, unactualized, underdeveloped, unevolved, unprogressive, untaught, untrained |
| Antonyms: | adult, developed, grown, mature |
| Main Entry: | unwilling |
| Part of Speech: | adjective |
| Definition: | not in the mood |
| Synonyms: | afraid, against, against the grain, averse, backward, begrudging, compelled, contrary, demurring, disinclined, disobliging, evasive, forced, grudging, hesitating, indisposed, indocile, involuntary, laggard, loath, malcontent, opposed, recalcitrant, refractory, reluctant, remiss, resistant, shrinking, shy, slack, slow, unaccommodating, uncheerful, uncooperative, uneager, unenthusiastic, uninclined, unobliging, unready, unwishful, wayward |
| Antonyms: | prepared, ready, willing |
| Main Entry: | upside-down |
| Part of Speech: | adjective |
| Definition: | overturned, inverted |
| Synonyms: | backward, bottom up, bottom-side-up, confused, disordered, downside-up, haywire, helter-skelter, in chaos, in disarray, jumbled, mixed-up, on head, reversed, tangled, topsy-turvy, upended, wrong way, wrong-side-up |
| Antonyms: | right-side-up |
| Main Entry: | unlearned |
| Part of Speech: | adjective |
| Definition: | ignorant |
| Synonyms: | backward, illiterate, instinctive, natural, uncivilized, uneducated, unscholarly, unschooled, untaught, untutored, unversed |
| Antonyms: | learned |
| Main Entry: | retarded |
| Part of Speech: | adjective |
| Definition: | limited |
| Synonyms: | backward, birdbrained, defective, dim, dim-witted, dopey, dull, dumbbell, dumbo, dumdum, dummy, exceptional, feeble-minded, gorked, half-witted, held back, imbecile, lamebrained, mentally defective, moronic, numbskull, opaque, pinhead, retardo, sappy, simple, simple-minded, slow, slow-witted, stupid, subnormal, touched, underachieving, weak, yo-yo |
| Main Entry: | reversed |
| Part of Speech: | adjective |
| Definition: | turned around |
| Synonyms: | backward, contrariwise, converse, everted, inside out, inverted, opposite, regressive, transposed, turned, turned back |
| Antonyms: | established, in order, ordered |
| Main Entry: | retrograde |
| Part of Speech: | adjective |
| Definition: | reverting |
| Synonyms: | backward, catabolic, contrary, declining, deteriorating, inverse, inverted, lapsing, receding, reversed, sinking, slipping, worsening |
| Antonyms: | forward, positive |
| Main Entry: | retrospective |
| Part of Speech: | adjective |
| Definition: | concerned with past |
| Synonyms: | backward, remembering, retroactive, reviewing |