Short for 千早の歌 (Chihaya-no-uta): a poem used as an insect repellent / a cruiser of the Imperial Japanese Navy (see Japanese cruiser Chihaya on Wikipedia.Wikipedia) / a place name / a surname

蟋蟀, 蛼: a cricket (insect)

gym; gymnasium

a wife's sister; more specifically, a wife's younger sister / a mother's sister, a maternal aunt / a mistress (extramarital female lover); more specifically, a father's mistress