to no one in particular
Used when speaking or muttering without directing words at a specific person. Often appears with verbs like 言う or つぶやく.
See also: ともなく
He said "I'm tired" to no one in particular.
She let out a small sigh, not directed at anyone.
Variant using the kanji 無 for なく.
Combination of 誰に (to whom) + ともなく (without specifying). The phrase is a fixed expression meaning 'to no one in particular'.