common: unsanctified
koinos describes what is held in common or treated as ordinary and unclean rather than set apart.
The dominant attested use marks things, persons, hands, or blood as common in a context of uncleanness, profanation, or exclusion; a second use describes possessions, salvation, and faith as shared. The verses therefore show both a negative contrast with what is set apart and a nonnegative sense of belonging in common.
Senses in use
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Ordinary or profaned in contrast to what is clean · dominant
In Acts 10:14 and Acts 11:8, the accusative and nominative singular neuter forms occur in Peter's refusal of anything described in the APB as “common or unclean.” Mark 7:2 and Mark 7:5 apply the dative plural feminine form to hands while the APB says “common, that is, unwashed”; Hebrews 10:29 places the accusative singular neuter form in the clause where the blood of the covenant is profaned. Revelation 21:27 and Romans 14:14 likewise place the singular neuter form in statements about uncleanness and what may enter.
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Shared or belonging in common · common
Acts 2:44 and Acts 4:32 use the plural neuter form for believers' possessions: the APB renders that they held everything “in common” and that all things were common to them. Jude 1:3 and Titus 1:4 use singular feminine forms with salvation and faith, which the APB calls “common.”
In the Anselm Project Bible: The APB uses “common” directly in the shared-possession, salvation, faith, hands, and food contexts, while it uses “profaned” for the covenant blood in Hebrews 10:29 and “unclean” in some related clauses. These renderings show the verses' presentation rather than a fixed English equivalent for each form.