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

一網打尽[ichimoudajin] (a) big haul
魚網[gyomou] fishing net
金網[kanaami] wire netting
交通網[koutsuumou] traffic network
公衆網[koushuumou] public network

叉手網[sadeami] dip net
刺し網[sashiami] gill net
支店網[shitenmou] branch store network
神経回路網[shinkeikairomou] biological neural network
粗い網[araiami] coarse net