IPA: /ˌsʌb.mænˈdɪb.jʊ.lər/
KK: /sʌbˈmændɪbələr/
Relating to the area beneath the lower jaw.
The dentist examined the submandibular glands for any signs of swelling.
Submandibular → It is formed from "sub-" (meaning under) and "mandibula" (from Latin, meaning jaw). The word describes something located under the jaw.
Think of something that is 'under' ('sub-') the 'jaw' ('mandibula') — that's why submandibular refers to the area beneath the jaw.