torment
tor-ment
verb
To cause someone or something great physical or mental suffering.
"The bullies tormented him daily."
noun
Extreme physical or mental suffering, or something causing it.
"He endured years of torment."
Thesaurus
Synonyms: curse, frustrate, dun, bedevil, crucify, rag, bedevilment, worrying, badgering, rack, excruciate, torture