- zeal[zeal 词源字典]
- zeal:  Zeal is closely related to jealousy. It comes via late Latin zēlus from Greek zélos ‘fervour, jealousy’. The medieval Latin derivative zēlōsus has left English a double legacy: zealous  and (via Old French) jealous.
=> jealous[zeal etymology, zeal origin, 英语词源]
- zeal (n.)
- "passionate ardor in pursuit of an objective or course of action," late 14c., from Old French zel (Modern French zèle) and directly from Late Latin zelus "zeal, emulation" (source also of Italian zelo, Spanish celo), a Church word, from Greek zelos "ardor, eager rivalry, emulation," "a noble passion" [Liddell & Scott], but also "jealousy;" prom PIE *ya- "to seek, request, desire." From mid-15c. as "devotion."