投とう函かん

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Common wordFreq.FrequencyTop 50,000

投函する · noun or participle which takes 'suru'

Meanings

Refers to putting a letter or postcard into a mailbox or postbox. Commonly used as a suru-verb.

〈物もの〉をポストに投とう函かんするto mail/post something in a mailbox
手て紙がみをポストに投とう函かんした。
I dropped the letter into the mailbox.
〈場ば所しょ〉で投とう函かんするto mail something at a certain place
郵ゆう便びん局きょくで投とう函かんするほうが早はやく届とどく。
Posting it at the post office gets it there faster.

郵ゆう送そうN3
郵送 is the general word for sending something by mail, while 投函 specifically means the act of dropping it into a mailbox or postbox.
送そう付ふN1
送付 is a formal term for sending documents or items by any means, whereas 投函 is limited to putting mail into a mailbox.

投とう稿こうN1
投函 means physically mailing a letter by putting it in a mailbox, while 投稿 means submitting or posting content, especially online.
投とう書しょN2
投書 refers to the letter or opinion piece itself (or the act of sending it to an editor), while 投函 specifically means the physical act of mailing/posting a letter in a mailbox.
投とう下か
投函 means to mail a letter by putting it in a mailbox, which learners can confuse with 投下 due to the similar spelling and reading.

ポスト投とう函かん
posting mail in a postbox · postbox delivery; delivery to a specified location

投とう函かんUsage98%
Standard kanji form for mailing/posting letters.
投とうかんUsage2%
search-only kanji form
Search-only kanji form; not a standard written variant.

Compound of 投 (throw, drop) and 函 (box, container). The kanji 函 is a less common variant of 箱 (box).