一昨日

Japanese

Etymology 1

Kanji in this term
一 昨 日
いつ > いっ
Grade: 1		 さく
Grade: 4		 じつ
Grade: 1
on’yomi

Compound of 一昨 (issaku-, “the previous... before...”) + 日 (jitsu, “day”).

Pronunciation

Noun

一昨日 (hiragana いっさくじつ, rōmaji issakujitsu)

  1. (formal) the day before yesterday, two days ago
See also

Etymology 2

Kanji in this term
一 昨 日
Grade: 1 Grade: 4 Grade: 1
Irregular

⟨woto2 tu pi1⟩ → */wotətupʲi/ → /wotot͡sufi/ → /otot͡suwi/ → /otot͡sui/

First attested in the Man'yōshū (c. 759 CE).

Originally a compound of 遠 (oto, “distant past”) + つ (tsu, Old Japanese case-marker particle) + 日 (hi, “day”).[1][3]

The kanji spelling is jukujikun (熟字訓).

Pronunciation

  • (Irregular reading)

Noun

一昨日 (hiragana おとつい, rōmaji ototsui, historical hiragana をとつひ)

  1. the day before yesterday, two days ago

Usage notes

Usually spelled in kana alone, rarely written with this kanji spelling.

Derived terms

Etymology 3

Kanji in this term
一 昨 日
Grade: 1 Grade: 4 Grade: 1
Irregular

/wotot͡sufi/ → /wototofi/ → /wototowi/ → /ototoi/

Shift from Old Japanese ototsui (see above).[1][3]

The kanji spelling is jukujikun (熟字訓).

Pronunciation

  • (Irregular reading)

Noun

一昨日 (hiragana おととい, rōmaji ototoi, historical hiragana をととひ)

  1. the day before yesterday, two days ago

Usage notes

Usually spelled in kana alone, rarely written with this kanji spelling.

Derived terms

Coordinate terms

時 (“Time”)
~ -2 -1 0 +1 +2 Continual
Day 日 一昨日 昨日 今日 明日 明後日 毎日
Morning 朝 一昨朝 昨朝 今朝 明朝 — 毎朝
Night 晩 一昨晩 昨晩 今晩 明晩 — 毎晩
Week 週 先々週 先週 今週 来週 再来週 毎週
Month 月 先々月 先月 今月 来月 再来月 毎月
Year 年 一昨年 去年 今年 来年 再来年 毎年

References

  1. 1 2 3 4 5 2006, 大辞林 (Daijirin), Third Edition (in Japanese), Tōkyō: Sanseidō, →ISBN
  2. 1 2 3 1998, NHK日本語発音アクセント辞典 (NHK Japanese Pronunciation Accent Dictionary) (in Japanese), Tōkyō: NHK, →ISBN
  3. 1 2 1995, 大辞泉 (Daijisen) (in Japanese), Tōkyō: Shogakukan, →ISBN
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