信封

• 拼音: xìn fēng
• 汉字拆解: 信 = 亻 (person) + 言 (speech), meaning trust or letter; 封 = 圭 (jade tablet) + 寸 (inch), originally meaning to seal with earth

含义

Envelope. A flat paper container used for enclosing a letter or document.

A concrete everyday noun. While letters are less common in the digital age, 信封 still appears in formal and official contexts such as mailing documents, invitations, or red envelopes containing money. Common usage: 把信放进信封 (put the letter in the envelope), 写信封 (address an envelope).

例句

1. 请把信放进信封里。
2. 她在信封上写了收件人的地址。
3. 桌子上有一个白色的信封。

用法指南

语境: postal, office, everyday

语气: neutral

正确说法

• 请帮我买几个信封。(Please help me buy some envelopes.)
• 信封上要写清楚地址。(The address must be written clearly on the envelope.)

错误说法

• 我发了一个信封给你。(Don't say you 'sent an envelope' when you mean you sent a letter — say 我寄了一封信给你. The 信封 is the container, not the message.)

起源与历史

信 means 'letter' or 'trust' and 封 means 'to seal' or 'envelope'. Together they describe the sealed container for a letter.

文化背景

世代: All ages

社会背景: Universal