Middle English distreynen, from Anglo-French destreindre, from Medieval Latin distringere, from Latin, to draw apart, detain, from dis- + stringere to bind tight — more at strain
distrainer\-ˈstrā-nər\ or distrainor\di-ˈstrā-nər, ˌdis-trā-ˈnōr\noun
History and Etymology for distrain
Anglo-French destreindre, literally, to constrict, force, from Old French, from Late Latin distringere to hinder, punish, from Latin, to pull in different directions, distract, from dis- apart + stringere to draw tight