unmould
/(ˌ)ʌnˈməʊld/verb
1 [with object] To destroy the mould or form of; to undo the moulding of. Also figurative. Now somewhat rare.
2 [with object] To take (something, especially food) out of a mould. Also without object with object implied.
Origin
Early 17th century; earliest use found in Randle Cotgrave (fl. 1587–?1630), lexicographer. From un- + mould.