noun
Almost always used in negative constructions such as 情け容赦なく (mercilessly) or 情け容赦がない (there is no mercy). The word itself is a noun, but it rarely appears outside these set patterns.
See also: 情け容赦なく
彼は情け容赦なく批判した。
He criticized mercilessly.
あの監督は選手に情け容赦がない。
That coach shows no mercy to the players.