torture

The infliction of severe pain or anguish, especially as an interrogation technique or punishment; (usually in the plural) a technique, method, or device which is designed to inflict such anguish.

People confess to anything under torture.

Using large dogs to attack bound, hand-cuffed prisoners is clearly torture.

The infliction of severe pain or anguish, especially as an interrogation technique or punishment; (usually in the plural) a technique, method, or device which is designed to inflict such anguish.

cock and ball torture

tickle torture

Severe pain or anguish, of mind or body.

An unpleasant sensation or its infliction: embarrassment, heartache, etc.

Every time she says 'goodbye' it is torture!

Coventry City midfielder Josh Ruffels described his 11 months out injured as 'absolute torture' after the goalless draw with Derby County Under-21s. (http://www.ccfc.co.uk/news/article/eleven-months-of-absolute-torture-760652.aspx)

To intentionally inflict severe pain or suffering on (someone), usually with the aim of forcing confessions or punishing them.

1 August 2014, Barack Obama, "Press Conference by the President"; transcript published online by the Obama White House Archives, [https://obamawhitehouse.archives.gov/the-press-office/2014/08/01/press-conference-president [1]]. With respect to the larger point of the RDI report itself, even before I came into office I was very clear that in the immediate aftermath of 9/11 we did some things that were wrong. We did a whole lot of things that were right, but we tortured some folks. We did some things that were contrary to our values.

People who torture often have sadistic tendencies.