If a word ends in a Consonant, it is not pronounced.
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However, if the consonant is C, R, F or L, it is not silent.
Sometimes a Silent Final Consonant can be overridden by Liaison.
Examples
Here are some examples. The letters crossed out will not be pronounced. The highlighted letters are an exception.
drap
vif
vert
canard
nuit
sac
bras
d’accord
estomac