恍惚 huǎng​hū
absent-minded adjective
distracted, inattentive, or in a trance-like state

He has been a bit absent-minded these past few days due to exhaustion.

vaguely adjective
in a dim, blurred, or indistinct manner; dazzled

Between sleep and wakefulness, I faintly heard the sound of rain outside the window.

Frequency

Written text
0.046 per million

Sources

Frequency data
BCC Corpus (BLCU)