Mark 7:2κοιναῖς
and they saw some of His disciples eating with hands that were defiled—that is, unwashed.
Acts 2:44κοινά
All the believers were together and had everything in common.
Romans 14:14κοινὸν
I am convinced and fully persuaded in the Lord Jesus that nothing is unclean in itself. But if anyone regards something as unclean, then for him it is unclean.
Titus 1:4κοινὴν
To Titus, my true child in our common faith: Grace and peace from God the Father and Christ Jesus our Savior.
Hebrews 10:29κοινὸν
How much more severely do you think one deserves to be punished who has trampled on the Son of God, profaned the blood of the covenant that sanctified him, and insulted the Spirit of grace?
Jude 1:3κοινῆς
Beloved, although I made every effort to write to you about the salvation we share, I felt it necessary to write and urge you to contend earnestly for the faith entrusted once for all to the saints.

Abbott-Smith

κοινός, -ή, -όν
[in LXX: Pro.1:14 (אֶחָד) Pro.21:9 25:24 (חֶבֶר), Wis.7:3, al. ;]

1. common (general; = Lat. communis): Act.2:44 4:32; κ. πίστις, Tit.1:4; σωτηρία, Ju 3

2. common (ordinary; = vulgaris); hence in LXX (1Ma.1:47, al.) and NT, unhallowed, unclean (cl., βέβηλος, which see): Mrk.7:2, 5, Act.10:14, 28 11:8, Rom.14:14, Heb.10:29, Rev.21:27.†
(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.