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Douglas Harper's Etymology Dictionary
repousse

"formed in relief," in reference to a type of decorative pattern, 1852, from French repoussé, past participle of repousser "to thrust back, beat back," from re- (see re-) + pousser (see push (v.)).

Wiktionary
repoussé

n. A metalworking technique in which a malleable metal is ornamented or shaped by hammering from the reverse side.

Usage examples of "repousse".

Rhys Michael set a coronet on his head that he had never worn before-a golden circlet hammered with a repousse of running lions, their legs and tails intertwined.