excruciating
US /ɪkˈskruː.ʃi.eɪ.t̬ɪŋ/
UK /ɪkˈskruː.ʃi.eɪ.t̬ɪŋ/

1.
intensely painful
:
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The pain in his leg was excruciating.
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She let out an excruciating scream.
2.
mentally agonizing; very embarrassing, awkward, or tedious
:
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The interview was an excruciating experience.
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Waiting for the results was excruciating.