Lygn

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

lygn

a. calm, smooth, of wind and waves (var veðr gott ok ~t).

Possible runic inscription in Younger Futhark:ᛚᚢᚴᚾ

Also available in related dictionaries:

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

• Old Norse - Cleasby & Vigfusson Dictionary
• Old Norwegian - Johan Fritzner's Dictionary