-Spasm of the muscles of the hand, as in writers' cramp.
From “chir-“ word-forming element meaning hand, from Latinized form of Greek “kheiro-“+“spasm” from Old French “spasme" - directly from Latin “spasmus” from Greek “spasmos”.
Used in a sentence:
“I bought a typewriter because my chirospasm was so painful I couldn't write anymore; but now I require surgery for the carpal tunnel.”
And speaking of the hand...here's the shirt for when you need to direct someone to talk to it! https://amzn.to/2rZZBBF