أَعْدَى

[a noun denoting the comparative and superlative degrees, and having several different significations]. أَعْدَى مِنَ الجَرَبِ More transitive, or wont to pass from one to another, than the mange, or scab, is a prov. (Meyd.) And أَعْدَى مِنَ الثُّوءَبَاءِ is another prov., having a similar meaning [i. e. More wont to pass from one to another, or, as we commonly say, more catching, than yawning]; (Meyd;) for when a man yawns in the presence of others, they become affected as he is. (TA in article ثأب.)

أَعْدَى مِنَ الذِّيءْبِ is also a prov., and may mean More wrongful, or more inimical, or more vehement in running, than the wolf. (Meyd.) أَعْدَى مِنْ سُلَيْكٍ, another prov., (explained in the latter half of the first paragraph,) is from العَدْوُ. (Meyd.)

هُوَ أَعْدَى شَىْءٍ [apparently meaning It is the most effectual thing to aid, or assist, or to avenge; أَعْدَى in this case being irregularly formed from the augmented verb in the phrase أَعْدَاهُ عَلَيْهِ]. (TA in article ادو: see ادَى in that article)