一いっ睡すい

noun, noun or participle which takes 'suru', intransitive verb

a sleep; a nap; a doze

Almost always used in negative or limited contexts, especially 一睡もできない (can't sleep a wink). Rarely used affirmatively.

• 昨さく夜やは一いっ睡すいもできなかった。

  I couldn't sleep a wink last night.

• 一いっ睡すいもせずに朝あさを迎むかえた。

  I greeted the morning without having slept at all.