na-adjective, noun
Describes something outrageously extreme in degree, often with a negative or emphatic tone. Used as a na-adjective or adverbially.
今日はべらぼうに暑い。
It's ridiculously hot today.
べらぼうな値段の時計を買ってしまった。
I ended up buying a watch at an outrageous price.
na-adjective, noun
Used for situations, ideas, or behavior that are senseless or beyond reason. Often carries a critical or mocking tone.
そんなべらぼうな話があるか。
Is there such a ridiculous story?
彼の言い分はべらぼうだ。
His argument is absurd.
noun
Derogatory noun for a foolish person. Strongly insulting; not for polite conversation.
あんなべらぼうに任せるな。
Don't leave it to such an idiot.
Search-only kanji form; not a standard spelling.
Katakana spelling used for emphasis or in casual writing.
Ateji kanji form; rarely used.
Rare kanji form.
The origin is uncertain. It may derive from べら (a pejorative prefix) combined with 棒 (ぼう, 'stick' or 'fellow'), but the exact derivation is unclear. The kanji forms are ateji.