stomach · noun C /ˈstʌm.ək/Full view
stomach
A2 the organ inside your body where food goes after it has been eaten and where it starts to be digested
Dictionary examples:

He has an upset stomach.

The doctor asked him to lie down on his stomach.

The sight of blood turns my stomach.

She has stomach problems.

Learner example:

Because I'm going to see a doctor [about] my stomach, I'll miss the class tomorrow. (Preliminary English Test; B1; Arabic)

sick to your stomach
C2 likely to vomit
Dictionary example:

I feel sick to my stomach.

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