必要十分 ひつようじゅうぶん Meanings な-adjective necessary and sufficient Kanji 必 must. Read as ヒツ. 要 need. Read as ヨウ. 十 ten. Read as ジュウ. 分 part. Read as ブン. Words containing 必要十分 必要十分条件 (ひつようじゅうぶんじょうけん) necessary and sufficient condition Jinuma: Japanese Dictionary · Word lists