Lasna

As defined by the Cleasby & Vigfusson Old Norse to English dictionary:

lasna

að, to decay, become dilapidated.

Possible runic inscription in Younger Futhark:ᛚᛅᛋᚾᛅ
Younger Futhark runes were used from 8th to 12th centuries in Scandinavia and their overseas settlements