The antonyms for the word "pro pose" include words like reject, oppose, decline, discourage, and veto. These words imply a negative or unfavorable response to a proposition or idea. For example, if someone proposed a new policy, but it was rejected by a group, it would mean that the idea was not accepted. Similarly, if someone opposes an idea, they are actively working against it. Alternatively, to decline or discourage something is to express disapproval without actively opposing it. Finally, to veto a proposition means to have the power to reject it outright. These antonyms illustrate the various ways in which an idea or proposition can be met with resistance.