Definition of “excruciating” - Learner’s Dictionary

excruciating

adjective uk us /ɪkˈskruːʃieɪtɪŋ/

very bad or painful:

Her illness causes her excruciating pain.
excruciatingly adverb

an excruciatingly embarrassing situation

(Definition of “excruciating” from the Cambridge Learner's Dictionary © Cambridge University Press)