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)

瑞西[suisu] Switzerland
瑞典[suweeden] Sweden
奇瑞[kizui] auspicious (good) omen
瑞瑞しい[mizumizushii] young (and lustrous)
瑞気[zuiki] good omen

瑞穂の国[mizuhonokuni] Japan, the Land of Abundant Rice
瑞兆[zuichou] auspicious sign
瑞祥[zuishou] auspicious sign
瑞雲[zuiun] auspicious clouds
瑞宝章[zuihoushou] Orders of the Sacred Treasure