► 副詞
一々 [(2)いちいち] [coll] meaning: one by one rank: 2
☆ 全部を一々調べている時間はない ⇨ We don’t have time to check all of them one by one (☛ Usually implies annoyance as in “every damn thing, time”)
一つ一つ [(5)ひとつひとつ] meaning: one by one rank: 2
☆ 彼等は問題点を一つ一つ解決していった ⇨ They solved the problems one by one (☛ Unlike いちいち, there is no annoyance)