leavenous

English

Etymology

From leaven +‎ -ous.

Adjective

leavenous (comparative more leavenous, superlative most leavenous)

Containing leaven.
(figuratively) Inducing change, especially a corrupting or vitiating change.
- 1649, J[ohn] Milton, chapter IX, in ΕΙΚΟΝΟΚΛΆΣΤΗΣ [Eikonoklástēs] […], London: […] Matthew Simmons, […], →OCLC, pages 79–80:
  For our Religion where was there a more ignorant, profane, and vitious clergy, learned in nothing but the antiquitie of thir pride, thir covetouſnesſs and ſuperſtition; whoſe unſincere and levenous Doctrine corrupting the people, firſt taught them looſneſs, then bondage

Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
(See the entry for “leavenous”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.)