English word ay comes from Proto-Indo-European *h₂eyu-, Proto-Germanic *agwjō, Proto-Indo-European *h₂ekʷeh₂, and later Proto-Germanic *ahwō (Stream, river. Water.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *h₂eyu- | Proto-Indo-European (ine-pro) | |
| *agwjō | Proto-Germanic (gem-pro) | |
| *h₂ekʷeh₂ | Proto-Indo-European (ine-pro) | |
| *aiw- | Proto-Germanic (gem-pro) | |
| *aiwa- | Proto-Germanic (gem-pro) | |
| *ahwō | Proto-Germanic (gem-pro) | Stream, river. Water. |
| ey | Old Norse (non) | Island. |
| agg | Middle English (1100-1500) (enm) | |
| ay | English (eng) | (archaic, poetic, _, or, _, Northern England) Always; ever; continually; for an indefinite time. (question tag). |