The Greek noun bdelygma means an abomination, a detestable thing, something utterly loathsome. It comes from the verb bdelysomai (to be nauseated by). In the Septuagint it translates the Hebrew toevah — used for idolatry, sexual immorality, and things God finds revolting. In the New Testament it appears most prominently in the apocalyptic phrase "abomination of desolation" and in Revelation.
The "abomination of desolation" (bdelygma erēmōseōs) — drawn from Daniel and cited by Jesus in Matthew 24:15 — refers to a sacrilegious desecration of the holy place that triggers divine judgment. Theologically, bdelygma marks the extreme boundary between the holy and the profane: what God called toevah/bdelygma was not merely culturally distasteful but ontologically incompatible with His presence. In Revelation, Babylon the Great holds a cup full of "abominations" — the spiritual antithesis of the pure cup of the new covenant. What God abhors, He will ultimately destroy.