Strong's G2000 — ἐπισφαλής (adjective)
episphales (ep-ee-sfal-ace') adj.
1. prone to trip
2. (figuratively) insecure
[from a compound of G1909 and sphallo "to trip"]
KJV: dangerous 
Root(s): G1909 
Hebrew root: ἐπί
Occurrences: 1