Acts 20:31νουθετῶν
Therefore be alert and remember that for three years I never stopped warning each of you night and day with tears.
Romans 15:14νουθετεῖν¶
I myself am convinced, my brothers, that you yourselves are full of goodness, brimming with knowledge, and able to instruct one another.
1 Corinthians 4:14νουθετῶν
I am not writing this to shame you, but to warn you as my beloved children.
Colossians 1:28νουθετοῦντες
We proclaim Him, admonishing and teaching everyone with all wisdom, so that we may present everyone perfect in Christ.
1 Thessalonians 5:12νουθετοῦντας
But we ask you, brothers, to acknowledge those who work diligently among you, who care for you in the Lord and who admonish you.
2 Thessalonians 3:15νουθετεῖτε
Yet do not regard him as an enemy, but admonish him as a brother.

Abbott-Smith

νουθετέω, -ῶ
(νοῦς, τίθημι, hence, put in mind), [in LXX: 1Ki.3:13 (כָּהָה pi.), Job.8:1-22 (יָסַר pi., בִּין), Wis.11:10 12:2, 26 * ;]
to admonish, exhort: with accusative of person(s), Act.20:31, Rom.15:14, 1Co.4:14, Col.1:28 3:16, 1Th.5:12 5:14, 2Th.3:15.†
(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.