Strong's G208 — ἀκυρόω (verb)
akuroo (ak-oo-roh'-o) v.
1. to invalidate
[from G1 (as a negative particle) and G2964]
KJV: disannul, make of none effect 
Root(s): G1, G2964 
Hebrew root: κυρόω
Occurrences: 3