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)

囲い[kakoi] enclosure
囲う[kakou] to enclose
囲み記事[kakomikiji] (newspaper) column
囲む[kakomu] to surround
囲碁[igo] Go (board game of capturing territory)

囲炉裡[irori] sunken hearth
囲にょう[inyou] surrounding
胸囲[kyoui] chest measurement
交際範囲[kousaihani] circle of acquaintance
広範囲[kouhani] extensive