re·pous·sé
/rəˌpo͞oˈsā/
adjective
(of metalwork) hammered into relief from the reverse side.
"a charming sterling silver bowl with repoussé motifs"
noun
repoussé metalwork.
Often “Repousse and Chasing” go together. Chasing is the term used for “hammering the material back from the opposite side” after repousse work