Lexical Definition

‎προσκαρτερέω‎ proskarteréō (pros-kar-ter-eh'-o) to continue in/with G:V
from ‎πρός‎ and ‎καρτερέω‎

attend (give self) continually (upon), continue (in, instant in, with), wait on (continually).

Usage: 7 forms in 11 verses
Form Translated As     In Verse(s)
προσκαρτερῶν steadfastly continuing Acts.8.13
προσκαρτερῇ may wait upon Mark.3.9
προσκαρτεροῦντεσ attending continually Rom.13.6
being constant Rom.12.12
steadfastly continuing Acts.1.14Acts.2.42Acts.2.46
προσκαρτερούντων attending Acts.10.7
προσκαρτερεῖτε do continue steadfastly Col.4.2
προσκαρτερήσομεν will steadfastly continue Acts.6.4
προσκαρτερήσαντεσ attending to constantly LXX.Num.13.20

Abbott-Smith

προσ-καρτερέω, -ῶ (< καρτερός, strong, stedfast), [in LXX: Nu 13:21* (חזק hith.), To 5:8 א, Da Th Su 6*;]
to attend constantly, continue stedfastly, adhere to, wait on: c. dat. pers., Mk 3:9, Ac 8:13 10:7; c. dat. rei, Ac 1:14 2:42 6:4, Ro 12:12, Col 4:2; seq. ἐν, Ac 2:46; εἰς, Ro 13:6.†

Abbott-Smith References

Book Refs
Numbers 13:21*
Mark 3:9
Acts 1:14 · 2:42 · 2:46 · 6:4 · 8:13 · 10:7
Romans 12:12 · 13:6
Colossians 4:2

Liddell-Scott-Jones

προσκαρτερέω-έω,

Doric dialect ποτι- [Refs 2nd c.BC+]:— persist obstinately in, τῇ πολιορκίᾳ [NT+5th c.BC+]; καίπερ ἀχθόμενοι τῇ καθέδρᾳ π. [Refs 1st c.AD+]

__2 adhere firmly to a man, be faithful to him, τινι [NT+2nd c.BC+]; of servants, remain in one's service, [Refs 4th c.BC+]; of a κοσμητής, [Refs]
__2.b remain in attendance at a law-court, τῷ βήματι, τῷ κριτηρίῳ, [Refs 1st c.AD+]
__2.c devote oneself to an office or occupation, τῇ στρατηγίᾳ [Refs 3rd c.AD+]; τῇ ἑαυτῶν γεωργίᾳ [Refs 2nd c.AD+]
__3 passive, προσκαρτερέωούμενος χρόνος time diligently employed, [Refs 1st c.BC+]
__4 wait for a person, Φιλέᾳ [Refs 3rd c.BC+]

LSJ Scripture Refs: Acts.1.14LXX.Num.13.21*Acts.8.13