This is the 14979th most frequent Russian word.
подписать
To sign.
Describe an action of signing official papers as an obligation or requirement.
Я подписал документы на новой работе.
I signed the documents at my new job.
Signing the postcard as a personal greeting or dedication.
Она подписала открытку и отправила её по почте.
She signed the postcard and sent it by mail.
Signing a petition to show support or agreement with a cause.