jubileeyoudaoicibaDictYouDict[jubilee 词源字典]
jubilee: [14] Despite their similarity, jubilee has no etymological connection with jubilation [14] and jubilant [17]; but they have exerted a considerable influence on it over the centuries. It was originally a Hebrew word: Hebrew yōbhēl meant ‘leading animal, ram’, and by extension ‘ram’s horn’, and since a ram’s horn was blown to announce the start of a special year (set aside once every fifty years according to ancient Hebrew law) in which slaves were freed, land left untilled, etc, the term yōbēl came to be used for the year itself.

Greek took it over as ióbēlos and formed an adjective from it, iōbēlaios. This was passed on to Latin, and it was here that jubilation took a hand. Latin jūbilāre (source of English jubilation) originally meant simply ‘call out’, but early Christian writers used it for ‘shout for joy’. Under its influence Greek iōbēlaios became Latin jūbilaeus, which was used in the expression annus jūbilaeus to denote this special Jewish year.

It soon came to be used as a noun in its own right, and in this role passed via Old French jubile into English. By this time the ideas of ‘fifty years’ and ‘joy, celebration’ had mingled to such an extent that the word was being used for a ‘fiftieth anniversary’ or its celebration, a sense which remained current until the early 20th century (in present-day English it means simply ‘anniversary’, usually of a monarch’s accession, and the period involved has to be defined by golden, silver, etc).
[jubilee etymology, jubilee origin, 英语词源]
jubilee (n.)youdaoicibaDictYouDict
late 14c., in the Old Testament sense, from Old French jubileu "jubille; anniversary; rejoicing," from Late Latin jubilaeus "the jubilee year," originally an adjective, "of the jubilee," altered (by association with Latin jubilare "to shout with joy") from Greek iabelaios, from iobelos, from Hebrew yobhel "jubilee," formerly "a trumpet, ram's horn," literally "ram."

The original notion was of a year of emancipation of slaves and restoration of lands, to be celebrated every 50th year (Levit. xxv:9); it was proclaimed by the sounding of a ram's horn on the Day of Atonement. The Catholic Church sense of "a period for remission of sin penalties in exchange for pilgrimages, alms, etc." was begun in 1300 by Boniface VIII. The general sense of "season of rejoicing" is first recorded mid-15c., though through early 20c. the word kept its specific association with 50th anniversaries. As a type of African-American folk song, it is attested from 1872.