agonise

verb (used without object), ag·o·nized, ag·o·niz·ing.

1. to suffer extreme pain or anguish; be in agony.
2. to put forth great effort of any kind.

verb (used with object), ag·o·nized, ag·o·niz·ing.

3. to distress with extreme pain; torture.

verb

1. to suffer or cause to suffer agony
2. (intr) to make a desperate effort; struggle; strive

v.

1580s, “to torture,” from Middle French agoniser or directly from Medieval Latin agonizare, from Greek agonizesthai “to contend in the struggle” (see agony). Intransitive sense of “to suffer physical pain” is recorded from 1660s. That of “to worry intensely” is from 1853. Related: Agonized; agonizing.