agonize

 
Pronunciation: /ˈagənʌɪz/
(also agonise)

verb

[no object]
  • undergo great mental anguish through worrying about something: I didn’t agonize over the problem
  • [with object] cause mental anguish to: a question which will agonize the technocrats

Origin:

late 16th century: from French agoniser or late Latin agonizare, from Greek agōnizesthai 'contend', from agōn 'contest'