Agony (noun) اذیت، تکلیف، کرب

extreme physical or mental suffering.
Example: “he crashed to the ground in agony”
Synonyms: pain, hurt, suffering, torture, torment, anguish, affliction, trauma, misery, distress, grief
Antonyms: contentment, happiness, joy
Excruciating (adjective) انتہائی تکلیف، دردناک

intensely painful.
Example: “excruciating back pain”
Synonyms: agonizing, extremely painful, severe, acute, intense, extreme, savage, violent
Antonyms: slight, mild