居眠り・居睡り|いねむりinemuri[2]nakadaka (mid-high)

JLPT N3approx.Common
Which spelling to use
居眠り居眠り(いねむり) is the most common written form and the one learners should use for general writing.
居睡り居睡り(いねむり) is rarely used, so learners will seldom encounter it and should not choose it as their usual form.
Definitions
  1. noun, suru verb, intransitive verbnodding off (while sitting); dozing
    授業じゅぎょう中ちゅうに居眠いねむりすることは許ゆるしません。↗
    I do not allow sleeping in class.
Conjugation
Dictionary form居眠りする(いねむりする)
Polite (masu)居眠りします(いねむりします)
Negative (nai)居眠りしない(いねむりしない)
polite (masen)居眠りしません(いねむりしません)
classical zu / nu居眠りせず・居眠りせぬ(いねむりせず・いねむりせぬ)
Past (ta)居眠りした(いねむりした)
polite (mashita)居眠りしました(いねむりしました)
Past negative (nakatta)居眠りしなかった(いねむりしなかった)
polite (masen deshita)居眠りしませんでした(いねむりしませんでした)
Te form居眠りして(いねむりして)
Potential居眠りできる(いねむりできる)
Passive居眠りされる(いねむりされる)
Causative居眠りさせる(いねむりさせる)
Causative passive居眠りさせられる(いねむりさせられる)
Conditional (ba)居眠りすれば(いねむりすれば)
tara居眠りしたら(いねむりしたら)
Volitional居眠りしよう(いねむりしよう)
polite (mashou)居眠りしましょう(いねむりしましょう)
Imperative居眠りしろ(いねむりしろ)

Common forms generated by rule; see the senses for honorific or irregular usage.

Synonyms & antonyms
  • SynonymうとうとNeutralDrowsy, light dozing, as in 「うとうとする」; describes the half-asleep state, while 「居眠り」 stresses actually falling asleep while seated.
  • Synonym仮眠かみんNeutralA deliberate short nap, as in 「仮眠を取る」; a conscious rest, whereas 「居眠り」 is falling asleep involuntarily.
  • Synonymうたた寝うたたねNeutralFalling asleep without meaning to, e.g. 「ソファでうたた寝」; unlike 「居眠り」 it is not limited to a sitting posture.
  • SynonymうつらうつらNeutralA drifting, half-asleep, drowsy state; hazier than 「うとうと」.
  • Synonym居眠るいねむるNeutralThe verb form of 「居眠り」, but rarely used; say 「居眠りする」 instead.
  • Related一睡いっすいWrittenWritten/formal prose for a short sleep; often in the negative 「一睡もしない」, meaning not sleeping a wink all night.
  • Antonym覚醒かくせいWrittenWritten/formal prose for waking up and becoming alert; the opposite of dozing off in 「居眠り」.

Use 「居眠り」 for unintentionally nodding off while seated. For drowsy half-sleep say 「うとうと」 or 「うつらうつら」, for dozing off anywhere 「うたた寝」, for a deliberate nap 「仮眠」; 「一睡」 is written prose and 「覚醒」 is the opposite.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

Japanese definitions
  1. 座すわった状態じょうたいのまま眠ねむってしまうこと。
  2. 何なんかをしたまま寝ねてしまうこと。
Kanji in this word

JLPT vocabulary levels are community estimates, not official (no official lists have been published since the 2010 revision).

Say it right, write it right

Core lookup works fully offline, with cloud pronunciation and one-tap save & review. Free, no sign-up.

Free downloadWindowsFree downloadmacOSDownload on the App StoreGet it on Google Play
MobileiOS / Android

Android

QR code for the Google Play pageGet it on Google Play

Scan it with your Android phone to install, or search for “Tomoshi” on Google Play.

iOS

QR code for the App Store pageDownload on the App Store

Scan it with your iPhone camera to install, or search for “Tomoshi” in the App Store.

Install the browser extensionLook words up on any web page · Chrome / Edge / Safari

Screenshot of a Tomoshi lookup resultScreenshot of Tomoshi lookup results on a phone

Windows macOS Chrome / Edge / Safari extension iOS / Android