Luke 9:51ἐστήρισεν
As the day of His ascension approached, Jesus resolutely set out for Jerusalem.
Romans 16:25στηρίξαι
Now to Him who is able to strengthen you by my gospel and by the proclamation of Jesus Christ, according to the revelation of the mystery concealed for ages past
1 Thessalonians 3:2στηρίξαι
We sent Timothy, our brother and fellow worker for God in the gospel of Christ, to strengthen and encourage you in your faith,
2 Thessalonians 2:17στηρίξαι
encourage your hearts and strengthen you in every good word and deed.
James 5:8στηρίξατε
You, too, be patient and strengthen your hearts, because the Lord’s coming is near.
1 Peter 5:10στηρίξει
And after you have suffered for a little while, the God of all grace, who has called you to His eternal glory in Christ, will Himself restore you, secure you, strengthen you, and establish you.

Abbott-Smith

στηρίζω
[in LXX for סָמַךְ, שׂוּם, etc. ;]
to fix, set fast, make fast: Luk.16:26; τ. πρόσωτον (Eze.6:2 13:17, al.; see Dalman, Words, 30 f.), Luk.9:51. Metaphorical, to confirm, establish: with, accusative, Luk.22:32, Act.18:23, Rom.1:11 16:25, 1Th.3:2 3:13, 2Th.3:3, Jas.5:8, 1Pe.5:10, Rev.3:2; id. before ἐν, 2Th.2:17, 2Pe.1:12.†
(AS)

Sources: Abbott-Smith’s Manual Greek Lexicon of the New Testament (1922, public domain) and glosses from STEPBible TBESG (CC BY 4.0); STEPBible TAGNT (Greek New Testament, CC BY 4.0); the Berean Standard Bible (public domain). Reformatted by Word Study, wording unchanged. All sources and licenses.