[ 'lu:sˌstrʌɪf ]
■ noun a waterside plant with a tall upright spike of flowers. [ Lythrum salicaria ( purple ~ ), Lysimachia vulgaris ( yellow ~ ), and related plants.]
Origin
C16: from loose + strife , taking the Gk name lusimakheion (actually from Lusimakhos , the name of its discoverer) to be directly from luein 'undo' + makhē 'battle'.