Sympathy
late 16th century (in sympathy (sense 3)): via Latin from Greek sumpatheia, from sumpathēs, from sun- ‘with’ + pathos ‘feeling’.
wiktionary
Borrowed from Middle French sympathie, from Late Latin sympathīa(“feeling in common”), from Ancient Greek σῠμπᾰ́θειᾰ(sumpátheia, “fellow feeling”), from σῠμπᾰθής(sumpathḗs, “affected by like feelings; exerting mutual influence, interacting”) + -ῐᾰ(-ia, “-y”, nominal suffix); equivalent to sym-(“acting or considered together”) + -pathy(“feeling”).
etymonline
sympathy (n.)
1570s, "affinity between certain things," from French sympathie (16c.) and directly from Late Latin sympathia "community of feeling, sympathy," from Greek sympatheia "fellow-feeling, community of feeling," from sympathes "having a fellow feeling, affected by like feelings," from assimilated form of syn- "together" (see syn-) + pathos "feeling" (from PIE root *kwent(h)- "to suffer").
In English, almost a magical notion at first; used in reference to medicines that heal wounds when applied to a cloth stained with blood from the wound. Meaning "conformity of feelings" is from 1590s; sense of "fellow feeling, compassion" is first attested c. 1600. An Old English loan-translation of sympathy was efensargung.
