封

fēng

measure word HSK 5 #1,147

Meanings

土 (earth) + 寸 (inch/hand) — pressing earth to seal something, like sealing a letter

Wǒ xiě le yì fēng xìn.

I wrote a letter.

Tā shōu dào le sān fēng yóujiàn.

He received three emails/letters.

Qǐng fēng shàng zhège xìnfēng.

Please seal this envelope.

grammar

封 as a measure word is specifically for letters and emails: 一封信 (a letter), 一封邮件 (an email). As a verb, it means 'to seal.'

封 fēng