If you say that something is probable, you mean that it is likely to be true or likely to happen.
近义词likely
反义词improbable , unlikely
双语例句例： It is probable that the medication will suppress the symptom without treating the condition.
该药物可能治标不治本。
例： A bomb was the incident's most probable cause.
炸弹很有可能是引起这次事故的原因。