ひっす 必須 Common word Wanikani level 52 LinksSentence search for 必須Sentence search for ひっすSentence search for ひっしゅSentence search for ひっすうKanji details for 必 and 須Edit in JMdict Noun which may take the genitive case particle 'no', Na-adjective (keiyodoshi), Noun1. indispensable; essential; requisite; required; compulsory; necessaryOther forms必須 【ひっしゅ】、必須 【ひっすう】 Discussions Log in to talk about this word.