Jera (Proto-Germanic): the (good) year, harvest; Jér (Gothic): year; Gér (Old English): year; Ar (Old Norse): year, (good) season
Phonetic value: j (pronounced y as in "yes"). In the later Old Norse period, after about 600 C.E., the initial j was lost in the West Norse dialects and thereafter the Rune stood for a.
Esoteric interpretation of name: life cycle, cycle of the Sun.
Ideographic interpretation: the holy marriage of heaven and earth, or the dynamic rotation of the summer-winter cycle.
Jera is the embodiment of the cyclical pattern of arising-being/becoming-passing-away to new arising. This a basic formula working throughout the Rune row. This Rune is one of the two "central runes" in the scheme of the Elder Futhark, and it defines the cyclical nature of the ever-evolving horizontal plane. It is the secret of the omnipresent circumference.
This is the mystery of the twelve-fold cycle known as the solar year. Raido is the daily path and guiding force of the sun, Jera is the yearly path, and Sowelu is the sun herself.
Jera is the reward for past actions that are honorable, right, and in accordance with natural law. This has no real moral implications - it is a natural law. If one sows correctly and hamingja ("luck") is with you then, according to tradition, you will be rewarded with a great reaping. It is the fruition of efforts well spent toward a willed or instinctual goal. This is true and valid for the supernatural as well as the phenomenological realms.
The cosmic fertility aspect of this Rune points to the Vanic god Freyr, who is invoked til árs ok fridhar {for good season (harvest) and peace}.
The Old Norse name ár gives us the popular association of this Rune with the Eagle (Old Norse ari) as a symbol of the swift flight of the archetypal sun.