Strong's G1601 — ἐκπίπτω (verb)
ekpipto (ek-pip'-to) v.
1. to drop away
2. (specially) be driven out of one's course
3. (figuratively) to lose, become inefficient
[from G1537 and G4098]
KJV: be cast, fail, fall (away, off), take none effect 
Root(s): G1537, G4098 
Hebrew root: πίπτω
Occurrences: 10