Strong's numbers
κατέχω (G2722)
katéchō
kat-ekh'-o
from κατά and ἔχω; to hold down (fast), in various applications (literally or figuratively):--have, hold (fast), keep (in memory), let, X make toward, possess, retain, seize on, stay, take, withhold.
Abbott–Smith
κατ-έχω, [in LXX for אחז, חזק hi., etc.;]
1. perfective of ἔχω (M, Pr., 116; M, Th., 155),
(a) to possess, hold fast: Lk 8:15, Jo 5:[4], Ro 1:18 (Lft., Notes, 251), I Co 7:30 11:2, II Co 6:10, I Th 5:21, He 3:6, 14 10:23;
(b) to lay hold of, get possession of: Lk 14:9.
2. to hold back, detain, restrain (M, Th., 156 f.): c. acc. seq. τοῦ μή c. inf., Lk 4:42; seq. πρός, c. acc., Phm 13; absol., τὸ κατέχον (ὁ κ.), II Th 2:6, 7.
3. Intrans., as nautical term, to put in, make for (LS, s.v.): Ac 27:40.†
From G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922), in the public domain.
19 occurrences
Shown in the King James Version (KJV), whichever translation you read in — it is the text these numbers are tagged against.
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1 Corinthians 15:2
By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain.
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2 Corinthians 6:10
As sorrowful, yet alway rejoicing; as poor, yet making many rich; as having nothing, and yet possessing all things.
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1 Thessalonians 5:21
Prove all things; hold fast that which is good.
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2 Thessalonians 2:6
And now ye know what withholdeth that he might be revealed in his time.
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2 Thessalonians 2:7
For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.
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Philemon 1:13
Whom I would have retained with me, that in thy stead he might have ministered unto me in the bonds of the gospel:
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Hebrews 3:6
But Christ as a son over his own house; whose house are we, if we hold fast the confidence and the rejoicing of the hope firm unto the end.
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Hebrews 3:14
For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end;
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Hebrews 10:23
Let us hold fast the profession of our faith without wavering;(for he is faithful that promised;)