Last Updated：2025/11/21

Dictionary quizzes to help you remember vocabulary

Dictionary quizzes to help you remember vocabulary

Lack of sleep; the property of being sleepless.

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sleeplessness

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Source Word

sleeplessness

uncountable usually

Lack of sleep; the property of being sleepless.

Japanese Meaning

不眠 / 眠れない状態

What is this buttons?

After several nights of sleeplessness, he began making mistakes on simple tasks.

Google Translation / DeepL Translation

数晩の睡眠不足の後、彼は簡単な作業でミスをし始めた。

Sense（1）

Lack of sleep; the property of being sleepless.

sleeplessnesses

（ plural ）

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