(stunt) v.t.
To check the natural development of; dwarf; cramp.
—noun
1. A check in growth, progress, or development.
2. A stunted animal or thing. [OE stunt dull, foolish; prob. infl. in meaning by ON stuttr short]
—stunt′ed adjective
—stunt′ed·ness noun

(stunt) U.S. Colloq. noun
1. A sensational feat, as of bodily skill.
2. Any remarkable feat, enterprise, or undertaking.
—v.i. To perform a stunt or stunts.
—v.t. To perform stunts with (an airplane, etc.). [Prob. <G stunde lesson; orig. college slang]