洞どう不ふ全ぜん症しょう候こう群ぐんMeaningsNoun1. sick sinus syndrome; sinus node dysfunction; SSSKanji used洞cave不negative全whole症medical condition候season群a pack (e.g. of dogs)Composed of洞どうsinus; cavity; antrum; neighborhood (administrative division in North Korea)Noun不ふ全ぜんpartial; incomplete; imperfectNa-adjective症しょう候こう群ぐんsyndromeNoun