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WordNet
do by

v. interact in a certain way; "Do right by her"; "Treat him with caution, please"; "Handle the press reporters gently" [syn: treat, handle]

Usage examples of "do by".

IN THE LONG RUN, WHAT HE CANNOT DO BY FORCE AND VIOLENCE IN THE SHORT ONE.

They've been given instructions on what we should do by some of our people who turned traitor.