sleepness

The state, condition, or instance of sleeping; sleep; sleepfulness.

Japanese Meaning

眠っている状態 / 睡眠 / 眠りの状態

Despite his exhaustion, the sudden sleepness that overtook him during the meeting surprised everyone.

疲れていたにもかかわらず、会議中に突然彼が眠りに落ちる状態になったことに皆が驚いた。

Sense（1）

The state, condition, or instance of sleeping; sleep; sleepfulness.

sleepnesses

（ plural ）