agonize
verb(British English also agonise)
[intransitive]- agonize (over/about something)
to spend a long time thinking and worrying about a difficult situation or problem 苦苦思索；焦虑不已 Word Originlate 16th cent.: from French agoniser or late Latin agonizare, from Greek agōnizesthai ‘contend’, from agōn ‘contest’.