ひとつひとつ
ひとつひとつ 【一つ一つ 】【一つずつ順番に 】one by one ; 【各々 】each .▸ 卵を一つ一つ数える count the eggs one by one .▸ 桃は一つ一つ紙で包んであった Each of the peaches was [The peaches were each ] wrapped in paper . (⇨一つずつ )