IPA: /ˈæd.ə.nɔɪ.dəl/
KK: /ˈæd.ə.nɔɪ.dəl/
Relating to the adenoids, which are small glands located in the throat. It can also describe a voice that sounds nasal or affected, often due to enlarged adenoids.
The child spoke in an adenoidal tone due to his enlarged adenoids.
Adenoidal → It is formed from "aden" (from Greek "aden", meaning gland) and "-oid" (meaning resembling or like). The word "adenoidal" refers to something that resembles or is related to glands, particularly the adenoids in the throat.
Think of 'aden' meaning gland, and remember that 'adenoidal' describes something that is like or related to glands.