The word "appertainment" is not commonly used in English, and may be considered archaic or outdated. It is pronounced /əˈpɛərmənt/, with the stress on the second syllable (ə-PAIR-muhnt). The first syllable is a schwa sound, which is a weak vowel sound. The word is spelled with two 'p's and two 'a's, which may seem unusual. However, this is because the word is derived from the Old French word "apartenance," which had the same spelling.