Vocabulary What does 不具合 (ふぐあい) mean? 不具合 (ふぐあい) means malfunction, defect (product, system). Quick factsReadingふぐあいLevel (estimated, JLPT framework)N2 不具合ふぐあいN2 · estimated, JLPT frameworkmalfunction, defect (product, system)Kanji in this word不not, no (negation prefix)具tool, means; complete合fit, match; combine