勤続疲労 きんぞくひろう Meanings Noun worsened performance because of long service; malfunctioning resulting from continuous long-term operation (pun on 金属疲労) Kanji 勤 on duty. Read as キン. 続 continue. Read as ゾク. 疲 tire 労 labor. Read as ロウ. Word lists Jocular Jinuma: Japanese Dictionary · Word lists