(idiomatic) "a fish who's found water" → In one's element, a duck to water.

breast, chest / heart, feeling, thought

chest, breast / heart, inner thoughts / bosom, breasts

breast

a male given name

a type of carbonated soft drink

principle; aim; purpose / gist; meaning

regret

(pathology) heartburn

得る, 獲る: to get, to acquire, to gain, to obtain, to win, to catch / 選る, 撰る, 択る: to choose, to select / 彫る, 雕る, 鐫る: to carve, to engrave; to inlay; to drill, to make a hole