saponify
Concise Oxford English Dictionary © 2008 Oxford University Press:
saponify /səˈpɒnɪfʌɪ/
▶verb (saponifies, saponifying, saponified) Chemistry turn (fat or oil) into soap by reaction with an alkali.
■ convert (any ester) into an alcohol and a salt by alkaline hydrolysis.
– derivatives
saponifiable adjective,
saponification noun.
saponifiable adjective,
saponification noun.
– origin C19: from Fr. saponifier, from L. sapo, sapon- ‘soap’.
'saponify' also found in these Oxford entries:

