herewith \(ˌ) ̷ ̷| ̷ ̷\adverb Etymology: Middle English herwith, from Old English hērwith, from hēr here + with : with this: a.: with this communication : accompanying this writing or document; specifically: enclosed in this envelope < you will find my check herewith > b.: with this proof : by this : in this way < herewith the principle is established — A.L.Kroeber >