Antonyms are words that have opposite meanings to a given word. For "demurral", which means to express reluctance or objection, the antonyms are many. Words like acceptance, agreement, approval, compliance, conformity, endorsement, acquiescence, concurrence, and consent are all antonyms of "demurral". These words indicate a positive response or a willingness to go along with something. Alternatively, there are words like enthusiasm, eagerness, willingness, acceptance, and alacrity that also work as antonyms of "demurral". Thus, depending on the context, we can choose from a range of antonyms to convey that someone is not objecting or objecting with reservation.