The phrase 'ถ้าหาก (thâa hàak)' in Thai is equivalent to 'if' or 'in case' in English. It is utilised in conditional sentences to express a hypothesis or indicate the possibility of an event. 'ถ้าหาก' is always followed by a clause that indicates a condition, and the sentence generally ends with an outcome or effect that will occur if that condition is met.