GRC
Bailly
ου (τὸ) obstacle, empêchement, SPT. Ex. 10, 7 ; cf. σκῶλος.
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LSJ
τό, = σκῶλος, EM 155.37, Hsch. (pl.).
stumblingblock, hindrance, like σκάνδαλον, LXX Ex. 10.7, al. ; — whence σκωλόομαι.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
τό, Anstoß, Hindernis, LXX.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)
TBESG
an impediment (MT)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars