nocturnality

inaudible, quiet, silent / calm, tranquil / still, stopped and not moving / not busy

eyesight, vision

to travel by night

Clipping of 百鬼夜行 (hyakki yagyō).

travelling by night / Clipping of 夜行列車 (yakō ressha).

a bird / a chicken / fowl or chicken meat

flying; flight

sex, gender / (grammar) gender

to know, be aware of / to learn, acquire, / to be acquainted with, to know (someone) / (colloquial, in the negative) to care in the least about, to be concerned with,