(grammar) a verbal conjugation class in which the verb stem ends in s-

(Classical Japanese grammar) a verbal conjugation class in which the verb stem ends in n-

cancellation of an order or contract / release, unlocking / disbanding / lifting of sanctions

character of human (personality), or of things.

clear, definite, precise

precision / accuracy

acute triangle (triangle all of the angles of which are acute)

(idiomatic) look at someone with fury, show rage in one's eyes

obtuse triangle

hair that tightly frames the face for a 小顔 (kogao) look