Proto-IE: *būs-
Meaning: to swell, to stuff
Old Greek: bǖnéō, bǖ́nō, bǘzdō (~ -ǖ́-), bǘō, aor. bǖ̂sai̯, p. ebǘsthēn, pf. bébüsmai̯, bebüsméno-, va. pará-büsto- `vollstopfen, anfüllen', bǘstrǟ f., bǘsma n. `Pfropf', bǘzdǟn `dicht gedrängt, eng aneinander'
Slavic: *būxātī, *būxorъ, *būxnǭtī, *būxā etc.
Germanic: *pū́s-a- m., *pus-an- m., *pūs-a- (?) vb., *pūs-t-a- m., *pūs-t-ō- vb., *pus-t-ō- vb., etc.
Celtic: *bousto- (~ -eu- ) > OIr būas `Bauch'
Albanian: mbuš `fülle an'
Russ. meaning: разбухать, набивать
References: WP II 114 f
