妄もう言げん多た謝しゃ

also: ぼうげんたしゃ

Meanings

please excuse my reckless remarks; kindly forgive my thoughtless words

A formal, self-deprecating yojijukugo used deferentially in letters or speeches to apologize for one's own careless or arrogant statements.

先せん日じつの発はつ言げんにつきましては、妄もう言げん多た謝しゃと存ぞんじます。
Regarding my remarks the other day, I must apologize for my reckless words.
手て紙がみの末まつ尾びに「妄もう言げん多た謝しゃ」と記しるした。
At the end of the letter, I wrote 'please excuse my thoughtless words.'

Kanji

妄delusion, unnecessarily, without authority
言say, word
多many, frequent, much
謝apologize, thank, refuse

Related words

失しつ言げん
失言 is a noun meaning 'slip of the tongue' or 'gaffe,' while 妄言多謝 is a formal expression of apology for one's own reckless remarks.
謝しゃ罪ざい
謝罪 is a general apology, whereas 妄言多謝 is a set phrase specifically apologizing for thoughtless words in a humble, literary manner.

Built from

妄もう言げん+多た謝しゃ

Written forms

妄言多謝
- もうげんたしゃ
  Standard kanji form for this yojijukugo.
- ぼうげんたしゃ
  Alternate reading; もうげんたしゃ is more common.
ぼうげんたしゃ

Etymology

A yojijukugo composed of 妄言 (reckless talk) and 多謝 (many thanks/apologies). The exact historical origin is uncertain, but it is used as a set phrase in formal correspondence.