Lexical Definition

‎στήκω‎ stḗkō (stay'-ko) to stand G:V
from the perfect tense of ‎ἵστημι‎

stand (fast).

Usage: 3 forms in 10 verses
Form Translated As     In Verse(s)
στήκοντεσ standing Mark.3.31
στήκετε are standing firm 1Thess.3.8
do stand firm 1Cor.16.13Gal.5.1Phil.4.12Thess.2.15
stand firmly LXX.Josh.10.19
you are standing firm Phil.1.27
you stand Mark.11.25
στήκει he stands Rom.14.4

Abbott-Smith

στήκω late Pres., formed from perf., ἕστηκα (v. B1., § 17; WH, App., 169; Kennedy, Sources, 158; M, Pr., 238; MM, xxiii), [in LXX: Ex 14:13 A, Jg 16:26 B, III Ki 8:11 B * ;]
= ἵστημι, to stand: Mk 3:31 11:25, Jo 1:26, Re 12:4 (ἕστηκεν T). Metaph., to stand firm, stand fast: absol., Ga 5:1 (but v. Field, Notes, 189 f.), II Th 2:15; seq. ἐν, Jo 8:44 (ἕστηκεν, T, R, mg.), I Co 16:13, Phl 1:27 4:1; c. dat., Ro 14:4.†

Abbott-Smith References

Book Refs
Exodus 14:13
Judges 16:26
1 Kings 8:11
Mark 3:31 · 11:25
John 1:26 · 8:44
Romans 14:4
1 Corinthians 16:13
Galatians 5:1
Philippians 1:27 · 4:1
2 Thessalonians 2:15
Revelation 12:4

Liddell-Scott-Jones

στήκω,

late present formed from ἕστηκα (perfect of ἵστημι), stand, [LXX+NT]; participle, παρὼν καὶ στήγων (sic) [Refs 4th c.AD+]; so στήκω, [Refs 3rd c.BC+].

LSJ Scripture Refs: Rom.14.41Cor.16.13