*stauma- m. ‘steam’ — OE stēam m. ‘id.’, E steam, Du. stoom c. ‘id.’ ⇒ *stoubʰ-mo- (ᴅʀᴠ). A mo- stem created to the root of *steuban- ~ *stūban-. In heavy syllables, PGm. *b was lost before *m, cf. *hwalma- and *hriman- ~ *hripan-.

*steuban- ~ *stūban- s.v. ‘to blow; to fly about’ — MDu. stuven, stieven s.v. ‘id.’, Du. stuiven s.v. ‘id.’, OHG stioban s.v. ‘id.’, G stieben s.v. ‘id.’ ⇒ *tséubʰ-e-­ (ɴᴇᴜʀ) — Close to Lith. siaũbti ( siaubiù, -iaũ ) ‘to dash about’ < *tséubʰ-ie-. A verb that is usually derived from a PIE root *steubʰ-, and which accord­ingly has been linked to e.g. Gr. στυφελίζω ‘to strike, dash, beat, drive away’ (Franck 1946: 681). Since, however, PIE *ts- was regularly metathesized to *st- in Germanic, cf. *stelan- ‘to steal’ < *tsél-e-, it is much more likely that *steuban- together with Lith. siaũbti ‘to dash about’ developed from PIE *tseubʰ-. See also *stauma- and *stubju-.