性機能不全 せいきのうふぜん Meanings Noun sexual dysfunction See also: 性機能障害 (せいきのうしょうがい). Kanji 性 nature. Read as セイ. 機 machine 能 ability. Read as ノウ. 不 un- 全 all. Read as ゼン. Word lists Medicine Jinuma: Japanese Dictionary · Word lists