In Aramaic, Semitic mḥy "to erase" and mẖḍ "to strike swiftly" or the like, have early on merged into this verb.
Sokoloff's Jewish Aramaic dictionaries have multiplied homographic lemmas here; but we think they are all one, except for "to declare effective".
In Syriac, as usual, Gt and Dt forms may alternate in poetry metri causa.