まっ四角[masshikaku] square
一天四海[ittenshikai] the world
下四半期[shimoshihanki] last quarter (of the year)
弦楽四重奏曲[gengakushijuusoukyoku] string quartet
再三再四[saisansaishi] repeatedly

三寒四温[sankanshion] alternation of three cold and four warm days
四つ[yottsu] four
四つんばい[yotsunbai] (crawl) on all fours
四つ角[yotsukado] four corners
四つ足[yotsuashi] four-footed (animal)

兎や角言う[toyakakuiu] to say all kinds of things
まっ四角[masshikaku] square
アフリカの角[afurikanotsuno] horn of Africa
一角[ikkaku] corner
一角の人物[hitokadonojinbutsu] somebody (important)

一角獣[ikkakujuu] unicorn
烏犀角[usaikaku] black rhinoceros horn
鋭角[eikaku] acute angle
外角[gaikaku] outside corner
町角[machikado] street corner

コーヒー豆[koohiimame] coffee bean
いんげん豆[ingenmame] common bean (Phaseolus vulgaris)
烏野豌豆[karasunoendou] vetch
塩豆[shiomame] salted beans
血豆[chimame] blood blister

高野豆腐[kouyatoufu] freeze-dried tofu
黒豆[kuromame] black soy bean
枝豆[edamame] edamame (green soybeans)
煮豆[nimame] cooked beans
小豆[azuki] adzuki beans