Œskuskeið

As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):

œskuskeið

n. the prime of life; vera af ~i, to be no longer a young man.

Possible runic inscription in Younger Futhark:ᚢᛋᚴᚢᛋᚴᛁᛁᚦ

Also available in related dictionaries:

This headword also appears in dictionaries of other languages closely related to Old Icelandic.

• Old Norwegian - Johan Fritzner's Dictionary