Up-rearing is a term used to describe the raising or rearing of something upwards. The antonyms for this word are related to lowering or bringing something down. Some of the popular antonyms for up-rearing are lowering, descending, declining, falling, dropping, sinking, and slumping. These words refer to the opposite action or movement that up-rearing represents. For instance, when a tree is up-reared, the opposite of this action, i.e., cutting it down, is the act of felling or lowering the tree. Similarly, the up-rearing of an airplane is the opposite of its descent or landing. The antonyms for up-rearing, therefore, vary depending on the context of its use.