hành

Etymology 2
Shortened from.

Coinage most likely facilitated by the homophony of the unrelated noun above, leading to further coinage of phrases like and.

Noun

 * 1)  torment; physical abuse

Etymology 3
. Normally a bound morpheme, but became somewhat free due to expressions such as, which may be expanded to. normally means "studies" but can be used as a rhetorical device to mean "theory and praxis".