expression, noun-modifying (irregular)
threatening; menacing
Describes a voice, tone, or words that carry an intimidating, gangster-like menace. Often used in contexts involving yakuza or tough characters.
See also: ドスの効いた声
彼はドスの効いた声で「動くな」と言った。
He said 'Don't move' in a threatening voice.
あの俳優はドスの効いた演技が得意だ。
That actor is good at menacing performances.
From ドス (slang for a threatening tone, possibly from the sound of a sword being drawn or from a dialectal word) + 効いた (past form of 効く, 'to be effective'). The phrase literally means 'with menace working effectively'.