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)

四條笛鯛[yosujifuedai] bluestripe snapper (Lutjanus kasmira)

葦笛[ashibue] reed pipe
横笛[yokobue] transverse flute (e.g. a fife)
角笛[tsunobue] horn
汽笛[kiteki] steam whistle
響笛[kyouteki] vibrating pipe

警笛[keiteki] horn
鼓笛[koteki] drum and fife
鼓笛隊[kotekitai] drum and fife band
口笛[kuchibue] whistle
喉笛[nodobue] windpipe

黄鯛[kidai] yellowback sea bream (Dentex tumifrons)
金眼鯛[kinmedai] splendid alfonsino (Beryx splendens)
真鯛[madai] tai (species of red Pacific sea bream, Pagrus major)
鯛焼[taiyaki] fish-shaped pancake filled with bean jam
鯛飯[taimeshi] rice with minced sea bream (tai)

石鯛[ishidai] striped beakfish (Oplegnathus fasciatus)
黒鯛[kurodai] black porgy (Acanthopagrus schlegeli)
甘鯛[amadai] tilefish (Branchiostegus spp.)
海老で鯛を釣る[ebidetaiwotsuru] to throw in a shrimp and pull out a whale