chef pronounced out of ignorance "shef" but in combinations, the "f" is not pronounced
n.
5Fr < chef de cuisine, lit., head of the kitchen: see CHIEF6
1 a cook in charge of a kitchen, as of a restaurant; head cook
2 any cook

chef-d‘oeuvre pronounced "shay dervr "
n.,
pl. chefs-d‘oeu[vre 7*e d<4vr‘8 5Fr, principal work6 a masterpiece, as in art or literature