The Greek adjective bdelyros means detestable, abominable, disgusting — evoking the same root of nausea and revulsion as bdelygma. It appears once in the New Testament in Revelation 21:8, in the list of those who will not inherit the new Jerusalem.
Revelation 21:8 lists eight categories excluded from the New Jerusalem, and bdelyrois (the detestable/vile) heads the list or appears near the "cowardly" and "faithless." The word is not merely a description of behavior but of character that has become fundamentally incompatible with God's holy presence. The theological force is sobering: the new creation is defined by absolute purity — nothing that causes revulsion before God will enter. This is not to terrorize the repentant sinner but to assure the redeemed that their eternal home will be forever free from everything that corrupts and destroys.