Complex sentence: The word "messuage" derives from the Anglo-French "mesuage" (holding), probably a corruption of popular Latin "mansio", whence modern French "maison" (house), from "manere" (to dwell).
Split into simpler sentences: The word "messuage" derives from the Anglo-French "mesuage" (holding). It is probably a corruption of popular Latin "mansio", whence modern French "maison" (house), from "manere" (to dwell).