adenoidal
From Longman Dictionary of Contemporary Englishadenoidalad‧e‧noid‧al /ˌædəˈnɔɪdl◂, ˌædənˈɔɪdl◂/ adjective an adenoidal voice is unpleasant and sounds as if it comes mainly through someone’s nose SYN nasal her adenoidal singing voiceExamples from the Corpusadenoidal• She's probably upset because her boyfriend doesn't want to go out with her on account of her amusing adenoidal accent.• The adenoidal whine of their accents dulled her hearing, and the smoke of their cigarettes made her eyes smart.