Correct

犯困

/ fànkùn /
Strokes

Definition

(coll.) to get sleepy

Example

As a Verb

feel sleepy; become drowsy/dozy

1
zi
屋子
tài
太热
  
,
ràng
rén
zhí
fànkùn
犯困
  

The room is so warm that it's making me feel drowsy.

2
Ràng
rén
fànkùn
犯困
de
tiān
天气

drowsy/somnolent weather

3
fàn
午饭
hòu
fànkùn
犯困

feel dozy/sleepy after lunch