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n.
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"
n.
a physician (especially an intern) who lives in a hospital and cares for hospitalized patients under the supervision of the medical staff of the hospital; "the resident was receiving special clinical training at the hospital"
adj.
not tried or tested by experience; "unseasoned artillery volunteers"; "still untested in battle"; "an illustrator untried in mural painting"; "a young hand at plowing"
adj.
not initiated; deficient in relevant experience; "it seemed a bizarre ceremony to uninitiated western eyes"; "he took part in the experiment as a naive subject"