To hold fast

Greek: κατεχω [katechô] (Verb). From κατα [kata] and εχω [echô]: to hold down, to hold fast.

κατεχω [katechô] appears 19 times in the NT:

(1) Matthew 21: 38 [variant]
But when the husbandmen saw the son, they said among themselves, This is the heir; come, let us kill him, and let us seize on his inheritance. - κατασχωμεν [kataschômen] 2Aorist Subjunctive Active, 1 pl. (variant: σχωμεν [schômen] 2Aorist Subjunctive Active, 1 pl. Verb εχω [echô]).

(2) Luke 4: 42
And when it was day, he departed and went into a desert place: and the people sought him, and came unto him, and stayed him, that he should not depart from them. - κατειχον [kateichon] Imperfect Indicative Active, 3 pl.

(3) Luke 8: 15
But that on the good ground are they, which in an honest and good heart, having heard the word, keep [it], and bring forth fruit with patience. - κατεχουσιν [katechousin] Present Indicative Active, 3 pl.

(4) Luke 14: 9
And he that bade thee and him come and say to thee, Give this man place; and thou begin with shame to take the lowest room. - κατεχειν [katechein] Present Infinitive Active.

(5) John 5: 4 [variant]
For an angel went down at a certain season into the pool, and troubled the water: whosoever then first after the troubling of the water stepped in was made whole of whatsoever disease he had. - κατειχετο [kateicheto] Imperfect Indicative Passive, 3 sg.

(6) Act 27: 40
And when they had taken up the anchors, they committed [themselves] unto the sea, and loosed the rudder bands, and hoised up the mainsail to the wind, and made toward shore. - κατειχον [kateichon] Imperfect Indicative Active, 3 pl.

(7) Romans 1: 18
For the wrath of God is revealed from heaven against all ungodliness and unrighteousness of men, who hold the truth in unrighteousness; - των κατεχοντων [tôn katechontôn] Present Participle Active, gen. pl. masc.

(8) Romans 7: 6
But now we are delivered from the law, that being dead wherein we were held; that we should serve in newness of spirit, and not [in] the oldness of the letter. - κατειχομεθα [kateichometha] Imperfect Indicative Passive, 1 pl.

(9) 1 Corinthians 7: 30
And they that weep, as though they wept not; and they that rejoice, as though they rejoiced not; and they that buy, as though they possessed not; - κατεχοντες [katechontes] Present Participle Active, nom. pl. masc.

(10) 1 Corinthians 11: 2
Now I praise you, brethren, that ye remember me in all things, and keep the ordinances, as I delivered [them] to you. - κατεχετε [katechete] Present Indicative Active, 2 pl.

(11) 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. - κατεχετε [katechete] Present Indicative Active, 2 pl.

(12) 2 Corinthians 6: 10
As sorrowful, yet alway rejoicing; as poor, yet making many rich; as having nothing, and [yet] possessing all things. - κατεχοντες [katechontes] Present Participle Active, nom. pl. masc.

(13) 1 Thessalonians 5: 21
Prove all things; hold fast that which is good. - κατεχετε [katechete] Present Imperative Active, 2 pl.

(14) 2 Thessalonians 2: 6
And now ye know what withholdeth that he might be revealed in his time. - το κατεχον [to katechon] Present Participle Active, acc. sing. neuter.

(15) 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. - ο κατεχων [ho katechôn] Present Participle Active, nom. sing. masc.

(16) Philemon 13
Whom I would have retained with me, that in thy stead he might have ministered unto me in the bonds of the gospel: - κατεχειν [katechein] Present Infinitive Active.

(17) 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. - κατασχωμεν [kataschômen] 2Aorist Subjunctive Active, 1 pl.

(18) Hebrews 3: 14
For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end; - κατασχωμεν [kataschômen] 2Aorist Subjunctive Active, 1 pl.

(19) Hebrews 10: 23
Let us hold fast the profession of [our] faith without wavering; (for he [is] faithful that promised;) κατεχωμεν [katechômen] Present Subjunctive Active, 1 pl.