clerk

nouns

an employee who performs clerical work (e.g., keeps records or accounts)
is derived from
is derived from
is derived from
is a type of (narrower)
a worker who is hired to perform a job
a salesperson in a store
is derived from

verbs

work as a clerk, as in the legal business
is derived from
is a type of (narrower)
exert oneself by doing mental or physical work for a purpose or out of necessity
"I will work hard to improve my grades"; "she worked hard for better living conditions for the poor"