HSK C6
Correct

胁

/ xié / 
Strokes

Definition

flank (the side of one's torso)/to coerce/to threaten

Example

As a Noun
flank ［side of the human body between the armpit and the waist］
1
Liǎng
两
xié
胁
téngtòng
疼痛

have a pain in both sides of the body

As a Verb
coerce; force