As defined by A Concise Dictionary of Old Icelandic (Geir Zoëga):
- adv. only in the phrase, svá f. er, so far; esp., svá f. er, not until, not before, only when; seg þú svá f. frá því, er þessi dagr er allr, wait till this day is past before you speak of that; svá f. ef, in case that.
Possible runic inscription in Younger Futhark:ᚠᚱᛁᛘᛁ
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This headword also appears in dictionaries of other languages closely related to Old Icelandic.