What does it mean ''to narrow one's eyes''?

Thank you


I understand it as in "squint"

I agree. Looking as if unable to see well...Thanks Pieanne
Students: We have free audio pronunciation exercises.
Or squinting to see better...
It can also happen with anger when you wish to cast a power gaze:
oO... Scaring... Emotion: stick out tongue
Students: Are you brave enough to let our tutors analyse your pronunciation?
Thank you guys!