From French agoniser, from Late Latin agonizare, from Ancient Greek ἀγωνίζομαι (agonizomai, “to fight, contend”). See agony.
- IPA: /ˈæ.ɡən.aɪz/
agonize (third-person singular simple present agonizes, present participle agonizing, simple past and past participle agonized) (intransitive)
- (intransitive) To writhe with agony; to suffer violent anguish.
- To smart and agonize at every pore. --Alexander Pope.
- (intransitive) To struggle; to wrestle; to strive desperately.
- 1898, J. Meade Falkner, Moonfleet Chapter 3
- So I took a last stare round, agonizing to see if there was any way of escape; but the stone walls and roof were solid enough to crush me, and the stack of casks too closely packed to hide more than a rat.
Related terms 
to writhe with agony; to suffer violent anguish.