anyone and everyone; anybody at all
Used to indicate that an action or state applies to people in general, without specifying individuals. Often appears in contexts like '誰彼となく話しかける' (talks to anyone and everyone).
He treats anyone and everyone kindly.
I went around calling out to anybody at all.
Standard kanji-kana mixed spelling.
Variant with かれ in kana; less common but still seen.
Rare spelling using the kanji 無 for なく.
Mixed kana-kanji spelling; very rare.
A set phrase combining 誰 (who) and 彼 (that person) with the particle と and the negative form of ある (ない → なく), literally 'without distinguishing who or that person'. The exact historical derivation is uncertain, but it has been used since at least the Edo period.