働く

Etymology
Most likely derived ultimately from a mimetic word, in turn possibly cognate with and.

Compare also adverb, verb.

First cited in the late 900s, with the sense of "to move one's body".

Verb

 * 1)  to work at a job, to labour
 * 2)  to work properly, to operate, to function; to carry out one's function, to be effective, to come into play
 * 3)   to perpetrate or commit a crime
 * 4)   to conjugate; to inflect; to decline
 * 1)   to perpetrate or commit a crime
 * 2)   to conjugate; to inflect; to decline
 * 1)   to conjugate; to inflect; to decline