squeamish (adj.) Look up squeamish at Dictionary.com
mid-15c., variant of squoymous "disdainful, fastidious" (c.1300), from Anglo-French *escoymous, which is of unknown origin.
He was somdel squaymous
Of fartyng, and of speche daungerous
[Chaucer, "Miller's Tale," c.1386]