1
more and more;all the more;increasingly
いよいよ薄暮、もうすぐ宵闇。
It's getting more and more shadowy, soon it will be twilight.
2
at last;finally;beyond doubt
いよいよ千載一遇のチャンスがめぐってきた。
At last, a chance in a million arrived.
3
(at the) last moment;worst possible time
Other forms
愈々 【いよいよ】 (rarely used kanji form) · 弥々 【いよいよ】 (rarely used kanji form) · 愈愈 【いよいよ】 (search-only kanji form) · 弥弥 【いよいよ】 (search-only kanji form)