ὀλιβρόν

From LSJ

ἀλλὰ τῷ ὕψει τῶν θείων ἐντολῶν σου → but by the sublimity of thy divine commandments

Source

Frisk Etymological English

Grammatical information: adj.
Meaning: ὀλισθηρόν, λεῖον, ἐπισφαλές H. besides ὠλίβραξαν ὤλισθον and, without ρ, ὀλιβάξαι ὀλισθεῖν H.
Origin: IE [Indo-European]X [probably] [663] *s(h₃)lib-ro- slippery, smooth
Etymology: Can be identical with OE slipor, OHG sleffar slippery, smooth (with Norw. slipra glide) from IE *slib-ro- (ὀ- prothetic; laryngal-explanation by Austin Lang. 17, 87). Here the primary verb OHG slīfan, MLG slīpen glide, schleifen [= grind, sharpen]' a.o. Further closer or farther cognates (w. lit.) in Bq, WP. 2, 391 f., Pok. 663 u. 960, W.-Hofmann s. lībō. S. also λίμβος and ὀλισθάνω. - The problem of s- beside prothetic vowel has not been solved; s. Beekes Devel. 82-87. One might assume *sh₃-.

Frisk Etymology German

ὀλιβρόν: {olibrón}
Meaning: ὀλισθηρόν, λεῖον, ἐπισφαλές H. Dazu ὠλίβραξαν· ὤλισθον und, ohne ρ, ὀλιβάξαι· ὀλισθεῖν H.
Etymology : Kann mit ags. slipor, ahd. sleffar schlüpfrig, glatt (wozu norw. slipra gleiten) aus idg. *slib-ro- (ὀ- prothetisch; Laryngalerklä-rung bei Austin Lang. 17, 87) identisch sein. Dazu das pri. märe Verb ahd. slīfan, mnd. slīpen ‘gleiten, schleifen’ u.a. Weitere nähere od. fernere Verwandte (m. Lit.) bei Bq, WP. 2, 391 f., Pok. 663 u. 960, W.-Hofmann s. lībō. S. auch λίμβος und ὀλισθάνω.
Page 2,376