Definition of appal in English:

appal

Line breaks: appal
Pronunciation: /əˈpɔːl
 
/
(US appall)

verb (appals, appalling, appalled)

[with object] (usually be appalled)

Origin

Middle English: from Old French apalir 'grow pale', from a- (from Latin ad 'to, at') + palir 'to pale'. The original sense was 'grow pale', later 'make pale', hence 'horrify' (late Middle English).

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Pronunciation: ˌkɒlərəˈtjʊərə
noun
elaborate ornamentation of a vocal melody