difficult to describe; a haunting elusive odor'

skillful at eluding capture; a cabal of conspirators, each more elusive than the archterrorist- David Kline

difficult to detect or grasp by the mind or analyze; his whole attitude had undergone a subtle change; a subtle difference; that elusive thing the soul

[ Syn: subtle ]

making great mental demands; hard to comprehend or solve or believe; a baffling problem; I faced the knotty problem of what to have for breakfast; a problematic situation at home

[ Syn: baffling , knotty , problematic , problematical , tough ]