←
Proto-Balto-Slavic *apē- (cognate)
←
Proto-Indo-European *h₂ep- (derived)
←
Proto-Indo-European *h₂op- (mention)
←
Proto-Indo-European *h₂op (mention)
←
Proto-Indo-European *eup- (mention)
←
Proto-Indo-European *ūp- (mention)
←
Proto-Indo-European *up- (mention)
←
Lithuanian ùpė (cognate)
←
Lithuanian upė (mention)
←
Lithuanian upìs (mention)
←
Lithuanian ùpis (mention)
←
Lithuanian upė (mention)
←
Old Prussian ape (cognate)
←
Old Prussian apus (mention)
←
Old Prussian - (cognate)
←
Old Prussian wupyan (cognate)
←
Old Prussian - (cognate)
←
Tocharian B - (cognate)
←
Tocharian A - (cognate)
←
Tocharian A āp (mention)
→
Lithuanian upė (cognate)