IPA: /sɒmˈnoʊləntli/
KK: /sɑmˈnoʊləntli/
In a way that shows drowsiness or sleepiness.
She spoke somnolently, struggling to keep her eyes open during the lecture.
Somnolently → It is formed from "somnus" (meaning sleep) and the suffix "-ly" (meaning in a manner). The word "somnolently" describes the manner of being sleepy or drowsy.
Think of 'somnus' as relating to sleep, and remember that 'somnolently' means acting in a sleepy manner.