"Un gainlier" is not a common term in English language, and therefore, an article about its antonyms may not be relevant. However, assuming that the intended word is 'ungainly', the antonyms for this term are 'graceful', 'elegant', 'nimble', 'agile', 'lithe', 'graceous', and 'flowing'. These antonyms describe the opposite of one's physical awkwardness, clumsiness, or lack of coordination. A person who is agile and graceful may move with ease and finesse, while an ungainly person may stumble and appear awkward. Therefore, using the appropriate antonyms for "ungainly" can enhance the precision of statements and convey the intended meaning effectively.