封ふう筒とうふうとうCommon wordJLPTN5Freq.FrequencyTop 20,000Meanings1nounenvelopeStandard word for a paper envelope used for mailing letters or documents.手て紙がみを封ふう筒とうに入いれて送おくった。I put the letter in an envelope and sent it.封ふう筒とうに宛あて名なを書かいてください。Please write the address on the envelope.