tending to or capable of propelling; "propellant fuel for submarines"; "the faster a jet plane goes the greater its propulsive efficiency"; "universities...the seats of propulsive thought"
lacking knowledge gained by study often in a particular field; "is unstudied in Latin as he is in may other matters"
not by design or artifice; unforced and impromptu; "an air of unstudied spontaneous utterance is apt to be painstakingly achieved"; "simple unstudied charm"