APPAL Meaning of APPAL in English ( US ~l ) ■ verb ( ~s , ~ling , ~led ) 1》 greatly dismay or horrify. 2》 [as adjective ~ling ] very bad or displeasing.Derivatives~lingly adverb OriginME: from OFr. apalir 'grow pale'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004