Old East Slavic

Conjunction

абꙑ ‎(aby)

1. so that, in order that
2. as long as
3. if

References

• Sreznevskij, I. I. (1893), “абꙑ”, in Materialy dlja slovarja drevne-russkago jazyka po pisʹmennym pamjatnikam [Materials for the Dictionary of the Old Russian Language According to Written Monuments] (in Russian), volume 1, Saint Petersburg: Imperial Academy of Sciences, page 4