誰だれ彼かれかまわず

Meanings

indiscriminately; regardless of who it is; anyone and everyone

Used when an action is done without caring who the person is, often with a negative or critical tone. Common in phrases like 誰彼かまわず話しかける (talk to anyone and everyone).

彼かれは誰だれ彼かれかまわず文もん句くを言いう。
He complains to anyone and everyone.
誰だれ彼かれかまわず声こえをかけるのはやめてください。
Please stop calling out to people indiscriminately.

Kanji

誰who, someone, somebody
彼he, that, the
構posture, stance, appearance

Related words

見み境さかいなく
見境なく means 'without distinction' or 'indiscriminately' in a broader sense, not limited to people. 誰彼かまわず specifically refers to not distinguishing between individuals.
手て当あたり次し第だい
手当たり次第 means 'using anything at hand' or 'haphazardly', focusing on objects or actions rather than people.

Written forms

誰だれ彼かれかまわず
Standard kanji-kana mixed spelling.
誰だれ彼かれ構かまわず
Variant using the kanji 構 for かまわず.

Etymology

A set phrase combining 誰 (who) + 彼 (he/that person) + かまわず (negative continuative of 構う, 'to care about'). Literally 'not caring who or what person', it became a fixed adverbial expression meaning 'indiscriminately (toward people)'.