skillful at eluding capture; "a cabal of conspirators, each more elusive than the archterrorist"- David Kline difficult to describe; "a haunting elusive odor"
Something or someone that is elusive is difficult to find, describe, remember, or achieve. In London late-night taxis are elusive and far from cheap. + elusiveness elu·sive·ness the elusiveness of her character