sexual arousal

to be in heat / to feel frisky

spring (device made of flexible material) / a motivation or catalyst leading to some other change

Kyūjitai form of 発情

Kyūjitai form of 発情

insult / treat with contempt

vest, waistcoat

returning directly home / (business, specifically) returning directly home instead of to the company after a visit elsewhere / (web design, specifically) bounce

to directly return home / (business, specifically) to return directly home instead of to the company after a visit elsewhere / (web design, specifically) to bounce

a child / (figuratively) a girl, especially a dear or desired one (compare use of English baby, babe) / a smaller or younger version of a bigger object