tajs

Etymology
Borrowed from, made into a first-declension masculine noun.

Noun

 * 1)  (male) Thai; a man, a person belonging to the Thai people of Thailand
 * 2)  Thai; pertaining to Thailand, to the Thai people, or their language
 * 1)  Thai; pertaining to Thailand, to the Thai people, or their language

Usage notes
Usually (rare, usually found in its genitive plural form, used as an adjective), ,  and  refer to the Thai people as an ethnic group, while , ,  refer to citizens of Thailand, including those who are not ethnically Thai.