extortion
Concise Oxford English Dictionary © 2008 Oxford University Press:
extort /ɪkˈstɔːt, ɛk-/
▶verb obtain by force, threats, or other unfair means.
– derivatives
extorter noun,
extortion noun,
extortioner noun,
extortionist noun,
extortive adjective.
extorter noun,
extortion noun,
extortioner noun,
extortionist noun,
extortive adjective.
– origin C16 (earlier (ME) as extortion): from L. extort-, extorquere ‘wrest’, based on torquere ‘twist’.
'extortion' also found in these Oxford entries:

