thumb به انگلیسی

From Longman Dictionary

thumb1 /θʌm/ ●●● S3 noun [countable]
the part of your hand that is shaped like a thick short finger and helps you to hold things
the part of a glove that fits over your thumb

Example
But it was plainly calculated as a thumb in the eye of the United States
Then he looked at Bill Wall, extending his hand with finger and thumb crooked
a baby sucking its thumb
She held the coin carefully between finger and thumb
I sat there and twiddled my thumbs