The term "go course" can be interpreted in different ways, so antonyms for it will vary depending on the intended meaning. If by "go course" we mean "to follow a certain path or route," some antonyms for it may include veer off, stray, meander or detour. Conversely, if we take "go course" as "to undertake a training or educational program," some antonyms for it may include drop out, discontinue, deviate or diverge. With yet another interpretation, if "go course" means "to flow or move steadily in a specific direction," some antonyms may be flow backwards, recede, dwindle, or falter. Whatever the context, antonyms for "go course" convey the idea of deviating or discontinuing a particular action or plan.