| Main Entry: | |
| Part of Speech: | adjective |
| Definition: | ancient, original |
| Synonyms: | archaic, basic, earliest, early, elementary, essential, first, fundamental, old, primal, primary, primeval, primordial, pristine, substratal, underivative, underived, underlying, undeveloped, unevolved |
| Antonyms: | current, modern, new, present |
| Main Entry: | aboriginal |
| Part of Speech: | adjective |
| Definition: | belonging to one, existing in a place since prehistory |
| Synonyms: | ancient, earliest, endemic, first, indigenous, native, original, primary, primeval, primitive, primordial |
| Antonyms: | foreign |
| Main Entry: | aborigine |
| Part of Speech: | noun |
| Definition: | first inhabitant |
| Synonyms: | aboriginal, autochthon, bushman, indigene, native, primitive |
| Main Entry: | antediluvian |
| Part of Speech: | adjective |
| Definition: | out-of-date; prehistoric |
| Synonyms: | age-old, ancient, antiquated, antique, archaic, hoary, obsolete, old, old-fashioned, passé, primeval, primitive, primordial, timeworn, venerable |
| Antonyms: | modern, new, up-to-date, young |
| Main Entry: | antiquarian |
| Part of Speech: | adjective |
| Definition: | old, ancient |
| Synonyms: | aged, antique, archaic, hoary, obsolete, primitive, timeworn, venerable |
| Antonyms: | modern, new, young |
| Main Entry: | archaic |
| Part of Speech: | adjective |
| Definition: | very old |
| Synonyms: | ancient, antiquated, antique, bygone, obsolete, old-fashioned, olden, out of date, outmoded, passé, primitive, superannuated |
| Antonyms: | current, modern, new, present, young |
| Main Entry: | austere |
| Part of Speech: | adjective |
| Definition: | grim, barren |
| Synonyms: | bald, bare, bare-bones, bleak, clean, dour, plain, primitive, rustic, severe, simple, spare, spartan, stark, subdued, unadorned, unembellished, vanilla |
| Antonyms: | extravagant, luxurious |
| Main Entry: | barbarian |
| Part of Speech: | adjective |
| Definition: | crude, savage |
| Synonyms: | barbaric, barbarous, boorish, brutal, coarse, cruel, inhuman, lowbrow, merciless, philistine, primitive, rough, rude, uncivil, uncivilized, uncouth, uncultivated, uncultured, unsophisticated, untamed, vicious, vulgar, wild |
| Antonyms: | civilized, cultured, educated, humane, kind, nice, polite, refined, sophisticated |
| Main Entry: | barbaric |
| Part of Speech: | adjective |
| Definition: | crude, savage |
| Synonyms: | barbarian, barbarous, boorish, brutal, coarse, cruel, fierce, graceless, inhuman, lowbrow, primitive, rough, rude, tasteless, uncivilized, uncouth, vulgar, wild |
| Notes: | barbaric pertains to crudeness and uncivility (based on Greek barbaros 'foreign'); barbarous pertains to cruelty, harshness, and immorality |