leavening

noun leavening

• agitator — If you describe someone involved in politics as an agitator, you disapprove of them because of the trouble they cause in organizing campaigns and protests.
• motivation — the act or an instance of motivating, or providing with a reason to act in a certain way: I don't understand what her motivation was for quitting her job. Synonyms: motive, inspiration, inducement, cause, impetus.
• incitement — the act of inciting.
• reactionary — of, pertaining to, marked by, or favoring reaction, especially extreme conservatism or rightism in politics; opposing political or social change.
• yeast — any of various small, single-celled fungi of the phylum Ascomycota that reproduce by fission or budding, the daughter cells often remaining attached, and that are capable of fermenting carbohydrates into alcohol and carbon dioxide.