tooth · noun C /tuːθ/
tooth
A1 one of the hard white objects in the mouth, which are used for biting and chewing
Dictionary examples:
front/back teeth
a broken/missing tooth
false teeth
Brush/Clean your teeth thoroughly morning and night.
I had to have a tooth out.
Learner example:
It is important for me, because without it I can't clean my teeth. (Key English Test; A2; Portuguese)
grit your teeth
C2 to accept a difficult situation and deal with it in a determined way
Dictionary example:
I hate exercising, but I just grit my teeth and try to get through it.