Arstädhia
Old Swedish Dictionary - arstädhiaMeaning of Old Swedish word "arstädhia" (or arstædhia) in Swedish.
As defined by K.F Söderwall's dictionary of Medieval Swedish:
Orthography: Early Old Swedish used different letters for ä and ö, so arstädhia may have also been written as arstædhia
Possible runic inscription in Medieval Futhork:ᛆᚱᛋᛏᛅᚦᚼᛁᛆ
Medieval Runes were used in Sweden from 12th to 17th centuries.