The term 'แต่เพียง (dtàe phiang)' is used in Thai language to express a limitation or exclusivity of an action or a condition. This term is similar to 'only', 'just', or 'merely' in English. It emphasizes the fact that there is nothing more or nothing else other than what is mentioned in the sentence. Typically, 'แต่เพียง' is placed before the verb or adjective to denote this limit or exclusivity.