Strong's G1263 — διαμαρτύρομαι (verb)
diamarturomai (dee-am-ar-too'-rom-ai) v.
1. to attest or protest earnestly
2. (by implication) hortatively
[from G1223 and G3140]
KJV: charge, testify (unto), witness 
Root(s): G1223, G3140 
Hebrew root: μαρτυρέω
Occurrences: 15