The word "bely" means to contradict or prove something false. There are various synonyms for this word that can be used depending on the context of the sentence. Some of these synonyms include "disprove," "contradict," "refute," "counter," "oppose," "negate," "dispute," "invalidate," "dismantle," and "debunk." All of these words describe the act of proving something to be untrue or demonstrating that it is incorrect. Using synonyms can help to add variety to your writing, as well as provide clarity regarding the meaning of the sentence.