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)

御手玉[otedama] beanbag
御手上げ[oteage] all over
御手盛り[otemori] making arbitrary decisions which benefit oneself
御手洗い[otearai] toilet
お手伝いさん[otetsudaisan] maid

手子摺る[tekozuru] to have much trouble
引っ手繰り[hittakuri] purse snatching
悪手[akushu] poor move
握手[akushu] handshake
安手[yasude] cheap kind

犬薄荷[inuhakka] catnip (Nepeta cataria)
愛犬[aiken] pet dog
愛犬家[aikenka] lover of dogs
一犬[ikken] one dog
狂犬[kyouken] mad dog

狂犬病[kyoukenbyou] rabies
軍犬[gunken] war dog
軍用犬[gunyouken] war dog
犬猿の仲[kenennonaka] loggerheads