instep
US /ˈɪn.step/
UK /ˈɪn.step/

1.
peito do pé
the part of a person's foot between the toes and the ankle, where the arch is highest
:
•
He kicked the ball with the instep of his foot.
Ele chutou a bola com o peito do pé.
•
The shoe was too tight across the instep.
O sapato estava muito apertado no peito do pé.