如鱼似水 rúyúsìshuǐ in one's element Definitions Defs Origin Strokes Stroke Words Sentences Sents 如 rú preposition to be like to be like; to be similar to; as if鱼 魚 yú noun fish fish; generic term for aquatic cold-blooded vertebrates with gills and fins似 sì adjective to resemble (bound form) to be similar to; to look like; to resemble水 shuǐ noun water water; a liquid, juice, or lotion