雇 hire

Hire a KODOMO (子), it is cheaper because they don't have rights.

Hire a turkey to stand in the door; it's a bouncer.

to fire ☆☆☆☆☆
解 (solve / untie) + 雇 (hire) = 解雇 (to fire)

to fire (although mostly people just say, クビになった！ (literally: My throat was cut!))