JMdict: 1546670

要因 【よういん】

  1. [n,adj-no] main cause; primary factor
Search on Immersion Kit
Search on Forvo

Kanji in this word:

Kanji Meanings On Readings Kun Readings Grade
Need, Main Point, Essence, Pivot, Key To ヨウ い.る, かなめ 4
Cause, Factor, Be Associated With, Depend On, Be Limited To イン よ.る, ちな.む 5

Words often seen with this one: (experimental feature)

その (11), 大きな (10)