What does agonising mean?
Agonising means causing or involving intense physical or emotional suffering, and it also describes processes that are painfully slow or difficult to endure, such as an agonising wait for medical results or an agonising choice between two compelling options. It functions chiefly as an adjective but also serves as the present participle of the verb agonise, meaning to wrestle mentally with something at length. The word derives ultimately from the ancient Greek agōn, meaning a contest or struggle, which also gives us words like agony, antagonist, and protagonist. In register it is neutral enough for journalism and literature yet vivid enough for everyday conversation, where it conveys genuine anguish rather than mere inconvenience. British English spells it agonising while American English prefers agonizing, but the pronunciation and meaning are identical across regions.
Causing or characterized by severe physical or mental pain; extremely difficult or prolonged in a way that produces anguish.
"The final minutes of the match were agonising for both sets of supporters."
Standard British spelling; American English uses agonizing.
Present participle of agonise: to suffer prolonged mental anguish or intense worry over something.
"He spent days agonising over whether to tell her the truth."
The word traces back to the ancient Greek 'agōn' — the arena of athletic contest — so every agonising wait carries an echo of Olympic struggle.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of agonising
Agonising comes from the verb agonise, which entered English from the Greek agōn, meaning a contest or struggle, via Latin and French influence in the early modern period. The same Greek root produced agony, agonistic, antagonist, and protagonist, all preserving the sense of striving or conflict. The adjective form developed naturally from the verb's participial use, and the spelling split between British agonising and American agonizing reflects broader transatlantic orthographic conventions rather than any difference in origin.
Related word forms
How agonising is actually used
Agonising is the standard spelling in British English; American English uses agonizing. The word carries strongly negative connotations of suffering and is common in both everyday speech and journalism, often describing decisions, waits, injuries, or defeats.
Easily confused with agonising
Agonizing is simply the American spelling of the same word, while agonising is the standard British spelling.
Agony is the noun denoting the intense pain itself, whereas agonising describes something that causes or involves such pain.