IPA: /ˈtɔːrtʃərər/
KK: /ˈtɔrtʃərər/
A person who inflicts severe pain or suffering on someone, often for punishment or to extract information.
The torturer was brought to justice for his crimes against humanity.
Torturer → It is formed from "tortura" (from Latin, meaning to twist or torment) and "-er" (meaning a person who). A torturer is a person who twists or torments others, typically through infliction of pain.
Think of someone who 'twists' ('tortura') and 'torments' others — that's why a torturer is a person who inflicts pain.