eventful (adj.)youdaoicibaDictYouDict[eventful 词源字典]
c. 1600, from event + -ful. According to OED, it is in Shakespeare, once ("As You Like It"), and there is no record of it between then and Johnson's "Dictionary." Related: Eventfully; eventfulness. Eventless is attested from 1815.[eventful etymology, eventful origin, 英语词源]