yovel

This is the older, concrete sense of the word. In the earliest texts it names either the animal itself or the horn taken from it and turned into a signaling instrument. When Israel gathered at Sinai, the people could approach the mountain only once this horn sounded a long blast (Exodus 19:13). At Jericho, priests carried these horns around the city for seven days, and on the seventh the long blast brought the walls down (Joshua 6).

The word sits beside two close relatives. A shofar is the finished trumpet; a keren is the horn of any animal. This word points to the source: the ram, or its horn as the raw material the trumpet is made from. The phrases in Joshua make that plain, naming the trumpets as belonging to these animals and calling one instrument the horn of the ram.

From this concrete instrument the word took on a second life. Because the fiftieth year was announced across the land by a long blast of this very horn, the year itself came to be called by the horn's name, which is the second meaning below.

Every fiftieth year, after seven cycles of seven years, Israel was to sound the ram's horn on the Day of Atonement and declare release across the land. Property that families had been forced to sell reverted to them, and Israelites who had sold themselves into service returned home (Leviticus 25). The year is named after the horn that announced it: what began as the word for the instrument became the name of the institution it set in motion.

Leviticus and Numbers use the word as a fixed legal term, often simply as the year of the Jubilee. Its purpose is built into how it works: it is the year of going back, when people return to their own family land and their own clan. The companion command in the same law, to proclaim liberty throughout the land, carries the social heart of the year, while this word supplies its name and its timing.

A reader should not picture a horn here. By the time of these laws the word has fully crossed over to name a recurring sabbatical year, a reset of debt and ownership that protected families from permanent landlessness.