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"
(usually followed by `of') having capacity or ability; "capable of winning"; "capable of hard work"; "capable of walking on two feet"
(followed by `of') having the temperament or inclination for; "no one believed her capable of murder"
possibly accepting or permitting; "a passage capable of misinterpretation"; "open to interpretation"; "an issue open to question"; "the time is fixed by the director and players and therefore subject to much variation"