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”).

Noun

一(いっ)昨(さく)日(じつ) • (issakujitsu) 

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

See also

• 一昨昨(いっさくさく)日(じつ) (issakusakujitsu, “three days ago”)

Etymology 2

Kanji in this term
一	昨	日
Grade: 1	Grade: 4	ひ > い Grade: 1
irregular		kun'yomi

⟨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”).

The kanji spelling is jukujikun (熟字訓).

Noun

一昨日(おとつい) • (ototsui) ^{←をとつひ (wototufi)?}

1. the day before yesterday, two days ago

Usage notes

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

Derived terms

• 一昨昨日(さきおとつい) (saki-ototsui, “three days ago”)

Etymology 3

Kanji in this term
一	昨	日
Grade: 1	Grade: 4	ひ > い Grade: 1
irregular		kun'yomi

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

Shift from Old Japanese ototsui (see above).

The kanji spelling is jukujikun (熟字訓).

Noun

一昨日(おととい) • (ototoi) ^{←をととひ (wototofi)?}

1. the day before yesterday, two days ago

Usage notes

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

Derived terms

Derived terms

• 一昨日(おととい)御出(おい)で (ototoi oide, “go away and don't ever come back”, literally “come here the day before yesterday”)
• 一昨日(おととい)来(こ)い (ototoi koi, “go away and don't ever come back”)
• 一昨昨日(さきおととい) (saki-ototoi, “three days ago”)

Coordinate terms

時 (“Time”)
	~	−3	−2	−1	0	+1	+2	Continual
Day	日	一昨昨日	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	一昨昨年	一昨年	去年	今年	来年	再来年	毎年