Middle English word busken comes from Proto-Indo-European *bʰowHéyeti, Proto-Indo-European - -yéti, Proto-Indo-European *bʰōw-, Old Norse búask, and later Proto-Indo-European *bʰúHt (To become.)
| Dictionary entry | Language | Definition |
|---|---|---|
| *bʰowHéyeti | Proto-Indo-European (ine-pro) | |
| - -yéti | Proto-Indo-European (ine-pro) | |
| *bʰōw- | Proto-Indo-European (ine-pro) | |
| búask | Old Norse (non) | |
| *bʰúHt | Proto-Indo-European (ine-pro) | To become. |
| *bʰuHyéti | Proto-Indo-European (ine-pro) | To be becoming, to be growing, to be appearing. |
| *būaną | Proto-Germanic (gem-pro) | To dwell, to reside. |
| bóa | Old Norse (non) | |
| *busklen | Middle English (enm) |