expression, godan verb (-su)
threaten; intimidate with a menacing tone
Rare expression used in rough or yakuza-like contexts; literally 'to make one's dagger effective', implying a threatening attitude or voice. The related form ドスを利かせる is more common.
See also: ドスを利かせる (ドスをきかせる)
彼はドスを効かした声で「金を出せ」と言った。
He said 'Hand over the money' in a threatening voice.