| adequate | (adjective) having the requisite qualities or resources to meet a task | Synonyms: equal |
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| (adjective) about average; acceptable | Synonyms: fair to middling, passable, tolerable |
| (adjective) sufficient for the purpose | Synonyms: enough |
| antiquated | (adjective) so extremely old as seeming to belong to an earlier period | Synonyms: antediluvian, archaic |
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| aquatic | (adjective) operating or living or growing in water | - |
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| (adjective) relating to or consisting of or being in water | - |
| equatorial | (adjective) of or existing at or near the geographic equator | - |
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| (adjective) of or relating to conditions at the geographical equator | - |
| (adjective) of or relating to or at an equator | - |
| inadequate | (adjective) lacking the requisite qualities or resources to meet a task | Synonyms: unequal |
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| (adjective) of insufficient quantity to meet a need | Synonyms: jejune, poor, short |
| quaternary | (adjective) consisting of or especially arranged in sets of four | Synonyms: quaternate |
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| (adjective) coming next after the third and just before the fifth in position or time or degree or magnitude | Synonyms: 4th, fourth |
| quaternate | (adjective) consisting of or especially arranged in sets of four | Synonyms: quaternary |
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| semiaquatic | (adjective) partially aquatic; living or growing partly on land and partly in water | Synonyms: subaquatic |
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| (adjective) having an aquatic early or larval form and a terrestrial adult form | Synonyms: amphibiotic |
| squat | (adjective) having a low center of gravity; built low to the ground | Synonyms: underslung |
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| (adjective) short and thick; as e.g. having short legs and heavy musculature | Synonyms: chunky, dumpy, low-set, squatty, stumpy |
| squatty | (adjective) short and thick; as e.g. having short legs and heavy musculature | Synonyms: chunky, dumpy, low-set, squat, stumpy |
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| subaquatic | (adjective) partially aquatic; living or growing partly on land and partly in water | Synonyms: semiaquatic |
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| (adjective) growing or remaining under water | Synonyms: subaqueous, submerged, submersed, underwater |