thumb
US /θʌm/
UK /θʌm/

1.
polegar
the short, thick first digit of the human hand, set apart from the other four and opposable to them.
:
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He gave a thumbs-up to show approval.
Ele deu um polegar para cima para mostrar aprovação.
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She hurt her thumb while playing basketball.
Ela machucou o polegar enquanto jogava basquete.
1.