Proto-Baltic: *apuš-ā̂ f., *apuš-iā̃ f., -ia- c., *ap[s]-iā̃ f.
Meaning: asp
Lithuanian: ãpušē, apušē̃ `Espe, Zitterpappel', dial. ẽpušē, epušē̃, ẽpuši-s `id.'
Lettish: apse (pl. gen apšu/apsu), apsa `Espe (Populus tremula L.)'
Old Prussian: abse `Espe'