Guise

Customary way of speaking or acting; custom; fashion; manner; behavior; mien; mode; practice; -- often used formerly in such phrases as: at his own guise; that is, in his own fashion, to suit himself.

External appearance in manner or dress; appropriate indication or expression; garb; shape.

Cover; cloak; as, under the guise of patriotism.

an artful or simulated semblance; "under the guise of friendship he betrayed them"