Strong's G4342 — προσκαρτερέω (verb)
proskartereo (pros-kar-ter-eh'-o) v.
1. to be earnest towards
2. (to a thing) to persevere, be constantly diligent
3. (in a place) to attend assiduously all the exercises
4. (to a person) to adhere closely to (as a servitor)
[from G4314 and G2594]
KJV: attend (give self) continually (upon), continue (in, instant in, with), wait on (continually) 
Root(s): G4314, G2594 
Hebrew root: καρτερέω
Occurrences: 10