The word "tertiary" is a Adjective that means Third in order or level. In Bengali, it is expressed as "তৃতীয়, তৃতীয় পর্যায়ের, গৌণ", which carries the same essential meaning. For example: "The 'tertiary' sector of the economy includes services.". Understanding "tertiary" enhances vocabulary and improves language comprehension for both English and Bengali speakers This term plays an important role in effective communication and language learning.