IPA: /ˈdraʊ.zi.nəs/
KK: /ˈdraʊzɪnəs/
The condition of feeling sleepy or tired, often making it hard to stay awake.
After a long day at work, I often experience drowsiness in the evening.
Drowsiness → It is formed from "drowse" (from Middle English *drosen*, meaning to be sleepy or doze) and "-iness" (a suffix indicating a state or condition). The word "drowsiness" refers to the state of being sleepy or inclined to doze off.
Think of the word 'drowse' which means to be sleepy, and the '-iness' shows it's a state of being. So, drowsiness is the state of being sleepy.