a person who contributes to the fulfillment of a need or furtherance of an effort or purpose; "my invaluable assistant"; "they hired additional help to finish the work"
abjectly submissive; characteristic of a slave or servant; "slavish devotion to her job ruled her life"; "a slavish yes-man to the party bosses"- S.H.Adams; "she has become submissive and subservient"
blindly imitative; "a slavish copy of the original"