攰

Glyph origin
– reminiscent of the idiom.

Etymology 1
Likely cognate with 🇨🇬.

The etymology is uncertain. This character itself is often regarded as the etymological character, but the expected Cantonese reflex from the fanqie found in  would be gwai3 instead of gui6. In recent years, this character has overtaken as the usual way this word is written, probably because of its appearance on the show  in the 1980s.

The following are other etymologies that have been proposed:
 * suggests as the etymological character. This character has been rejected by  for being a late word.
 * suggests as the etymological character: *gljiois (Old Chinese, based on Zhengzhang, 1987) > *gljioi > *gioi > *kioi > *koi > *kui (Guangzhou), *kɔi (Yangjiang).

Definitions

 * 1)  tired; exhausted; fatigued