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Greek verb · G2901

κραταιόω

krataiookrat-ah-yo'-o

to strengthen

4 uses in the Greek text, one for each word STEP Bible has tagged with this key

Concordance spelling: krataióō

Word page · Part of the concordance, one page for every word of the Hebrew and Greek text. Strong's G2901is this word's number in James Strong's 1890 index of the King James Bible.

  • 3 of 27
    New Testament books
  • 3
    spellings

The definition in full

Strong's key (1890) · G2901

to empower, i.e. (passively) increase in vigor

The King James renders it: be strengthened, be (wax) strong.

James Strong, The Exhaustive Concordance of the Bible (1890), public domain. Strong indexed the King James text, and this site quotes his entry as that index.

Summary

krataioo is rendered "to strengthen". It stands 4 times in the Greek text, across three books.

  • Two of the uses stand in Luke, more than in any other book.
  • Its first use in canonical order opens the ledger below.Luke 1:80And the child grew and became strong in spirit; and he lived in the wilderness until the time of his public appearance to Israel.
  • The Greek text spells it three different ways.

The first use

And the child grew and became strong in spirit; and he lived in the wilderness until the time of his public appearance to Israel.

Luke 1:80ἐκραταιοῦτο

The first use, in the order of the New Testament's books.

Where the word stands

Two of the word's four uses are in Luke.

The other 24 New Testament books never use the word.

What the word means

Each meaning, and the words it is translated by

How the Greek text is glossed, word by word

  • do be strong1
  • He was being strengthened1
  • he was strengthened1
  • to be strengthened1

The words built on the same word-part

Each word below begins with the same letters this one begins with. A shared word-part shows a family. It does not settle what any one of them means, so each word carries its own uses on its own page. Scholars call that shared part the stem.

κρατέωkrateoto grasp/seizeUses47
κράτοςkratospowerUses12
κράτιστοςkratistosexcellentUses4
κραταιόςkrataiosmightyUses1

All 4, in canonical order

Every use, in order

Every use, grouped by book, with its verse.

3 spellings and their grammar

STEP Bible tags every word of the Hebrew and Greek text with its spelling and its grammar. Both lists below count the rows printed underneath, written out in English, with the code beside each one as it was tagged.

How it is spelled

  • ἐκραταιοῦτο2
  • κραταιοῦσθε1
  • κραταιωθῆναι1

The grammar of each form

  • verb · imperfect passive, indicative · 3rd person singular2V-IPI-3S
  • verb · aorist passive, infinitive (“to…”)1V-APN
  • verb · present passive, command · 2nd person plural1V-PPM-2P

Luke

two uses
  • And the child grew and became strong in spirit; and he lived in the wilderness until the time of his public appearance to Israel.

    Luke 1:80

    • ἐκραταιοῦτοekrataioutoverb · imperfect passive, indicative · 3rd person singulartagged: he was strengthened
  • And the Child grew and became strong. He was filled with wisdom, and the grace of God was upon Him.

    Luke 2:40

    • ἐκραταιοῦτοekrataioutoverb · imperfect passive, indicative · 3rd person singulartagged: He was being strengthened

1 Corinthians

one use
  • Be on the alert. Stand firm in the faith. Be men of courage. Be strong.

    1 Corinthians 16:13

    • κραταιοῦσθεkrataioustheverb · present passive, command · 2nd person pluraltagged: do be strong

Ephesians

one use
  • I ask that out of the riches of His glory He may strengthen you with power through His Spirit in your inner being,

    Ephesians 3:16

    • κραταιωθῆναιkrataiothenaiverb · aorist passive, infinitive (“to…”)tagged: to be strengthened

Where it leads

How the numbers are counted

Every count on this page comes from STEP Bible's tagged Hebrew and Greek text, the same text the ledger prints. A use is counted once each time the tagging marks a word with this key.

Spellings are counted as the Greek text spells them, with the sentence's own punctuation taken off the word first, so a form that ends a clause is not counted as a second spelling.

The family is read from the lexicon by the stem the two words share, with the accents off, and a person or a place named on the stem is left out.

Hebrew and Greek text, word tagging and grammar: STEP Bible (www.STEPBible.org), Tyndale House, CC BY 4.0. Their grammar codes are written out in English here and shown as tagged beside each one.

Meaning and senses: STEP Bible TBESG (Tyndale House, CC BY 4.0), the Brief lexicon based on Abbott-Smith (1922).

Dictionary key: Strong's Exhaustive Concordance of the Bible (1890, public domain). English verse text: Berean Standard Bible (public domain, 2023).

Revised 2026-09-05. Every cited work, the sources registry →