TREMBLE

I. intransitive verb (~d; trembling) Etymology: Middle English, from Anglo-French ~r, from Medieval Latin tremulare, from Latin tremulus tremulous, from tremere to ~; akin to Greek tremein to ~ Date: 14th century to shake involuntarily (as with fear or cold) ; shiver , to move, sound, pass, or come to pass as if shaken or tremulous , to be affected with great fear or anxiety , ~r noun II. noun Date: 1609 an act or instance of trembling, severe poisoning of livestock and especially cattle by a toxic alcohol present in a snakeroot ( Eupatorium rugosum ) and rayless goldenrod that is characterized especially by muscular tremors, weakness, and constipation