The Chinese word "吴国" is formed by combining the character "吴", which functions as a proper name designating the Wu region or clan, with the character "国", meaning "state" or "country", to specify it as a political entity, resulting in a term that refers to the historical State of Wu.
Word Definition - 吴国
wú guóWu state (in south China, in different historical periods); Wu state 220-280, founded by Sun Quan 孫權|孙权 the southernmost of the three Kingdoms