Excruciating.. linked to crux or crucifix

From dictionary.com

Excruciating
[ik-skroo-shee-ey-ting]

Synonyms Examples Word Origin
adjective
1.
extremely painful; causing intense suffering; unbearably distressing; torturing:
an excruciating noise; excruciating pain.
2.
exceedingly elaborate or intense; extreme:
done with excruciating care.
Origin of excruciating Expand
1655-16651655-65; excruciate + -ing2
Related forms Expand
excruciatingly, adverb
unexcruciating, adjective
Synonyms Expand
1. unbearable, insufferable, unendurable, agonizing, racking.
excruciate
[ik-skroo-shee-eyt]
Spell Syllables
verb (used with object), excruciated, excruciating.
1.
to inflict severe pain upon; torture:
The headache excruciated him.
2.
to cause mental anguish to; irritate greatly.
Origin
1560-70; 4< Latin excruciātus, past participle of excruciāre to torment, torture, equivalent to ex- ex-1+ cruciāre to torment, crucify (derivative of crux cross); see –