幼よう児じ突とつ然ぜん死し症しょう候こう群ぐんMeaningsNoun1. sudden infant death syndrome; SIDSKanji used幼very young児kid突thrust然sort of thing死death症medical condition候season群a pack (e.g. of dogs)Composed of幼よう児じyoung child; toddler; child over 1 but not yet of school ageNoun突とつ然ぜんabrupt; sudden; unexpectedNo-adjective死しdeath; (an) outNoun症しょう候こう群ぐんsyndromeNoun