The term "ex corticate" refers to the removal of a layer of bark from a tree. The pronunciation is /ɛks ˈkɔrtɪkeɪt/. The first syllable is pronounced with the "eks" sound, as in "extra," and the second syllable has a short "o" sound like in "cot." The ending "-ate" is pronounced with a long "a" sound, as in "ate." This word can be challenging to spell because it contains a silent "r" and the unfamiliar prefix "ex-."