Ræskja

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

ræskja

t, [= rumska], to clear the throat by coughing.

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