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

Alternative spelling of 止むを得ない (yamu o enai, “have no choice but to”)

Alternative spelling of 止むを得ない (yamu o enai, “have no choice but to”)

"to obtain one life from nine deaths": to narrowly escape death

type of greenling, of the family Hexagrammidae, (fish)

expenses

facing one another and being intimate / copulation; intercourse

(intransitive) to wake up

Kyūjitai form of 目録 (“category; list”)

A kagome lattice; an arrangement of laths composed of interlaced triangles such that each point where two laths cross has four neighboring points. Although called a lattice, it is more closely related to trihexagonal tiling than to a mathematical lattice.