Knappaðr

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

knappaðr

pp. furnished with studs or buttons (~ kyrtill).

Possible runic inscription in Younger Futhark:ᚴᚾᛅᛒᛒᛅᚦᚱ

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