Middle English (in an earlier sense). From Anglo-Norman and Middle French admesurer, amesurer to moderate (late 12th cent. or earlier in Anglo-Norman; also (reflexively) to show moderation), to measure, assess (dower, pasture, etc.), to consider, to allocate, apportion, to make measurement of from post-classical Latin admensurare to measure out, to allot, to assess, to moderate, restrict, to apportion, to measure from classical Latin ad- + mensūrāre.