► 名詞一日 [いちにち]
meaning: day rank: 1☆ この
仕事を一日でやるのは
無理だ ⇨ It is impossible to get this work done in one day
(☛ One day. Often pronounced いちんち in conversation)一日 [ついたち]
meaning: one rank: 1☆ 一月一日 ⇨ January first
(☛ The first day of a month only. The first day of an even is “初日” and “One day” is “いちにち”)