| adamantine | (adjective) consisting of or having the hardness of adamant | - |
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| (adjective) having the hardness of a diamond | - |
| (adjective) impervious to pleas, persuasion, requests, reason | Synonyms: adamant, inexorable, intransigent |
| amethystine | (adjective) containing or resembling amethyst | - |
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| bisontine | (adjective) relating to or characteristic of bison | - |
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| clandestine | (adjective) conducted with or marked by hidden aims or methods | Synonyms: cloak-and-dagger, hole-and-corner, hugger-mugger, hush-hush, secret, surreptitious, undercover, underground |
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| diamantine | (adjective) consisting of diamonds or resembling diamonds | - |
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| elephantine | (adjective) of great mass; huge and bulky | Synonyms: gargantuan, giant, jumbo |
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| libertine | (adjective) unrestrained by convention or morality | Synonyms: debauched, degenerate, degraded, dissipated, dissolute, fast, profligate, riotous |
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| palatine | (adjective) of or relating to a palace | - |
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| (adjective) of or relating to a count palatine and his royal prerogatives | - |
| (adjective) relating to or lying near the palate | Synonyms: palatal |
| philistine | (adjective) smug and ignorant and indifferent or hostile to artistic and cultural values | Synonyms: anti-intellectual |
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| pristine | (adjective) immaculately clean and unused | - |
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| (adjective) completely free from dirt or contamination | - |
| routine | (adjective) found in the ordinary course of events | Synonyms: everyday, mundane, quotidian, unremarkable, workaday |
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| serpentine | (adjective) resembling a serpent in form | Synonyms: snakelike, snaky |
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