おしぼり: moist hand towel

rack one's brains

(idiomatic) to rack one's brain, to think really hard

The hiragana syllable こ (ko). Its equivalent in katakana is コ (ko). It is the tenth syllable in the gojūon order; its position is か行お段 (ka-gyō o-dan, “row ka, section o”).

此: (derogatory) you / 是: (humble) you

(vulgar, slang) female genitals: a cunt, a pussy / (Internet slang, derogatory, offensive) a woman

(dialect, Tsugaru) a ruby (gemstone)

(vulgar, taboo slang) cunt (vagina) / (vulgar, taboo slang) sexual intercourse

小屋: cottage, hut, cabin; playhouse

小幅: single breadth, narrow range