agonize - definition and synonyms

verb [intransitive] 

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/ˈæɡənaɪz/
present tense
I/you/we/theyagonize
he/she/itagonizes
present participleagonizing
past tenseagonized
past participleagonized
  1. to spend a long time worrying and being upset about something
    agonize over/about:

    For days I agonized over whether to accept his offer.