Úc
Sino-Vietnamese word from 澳, from Middle Chinese 奧 (ʔjuwk); contracted from 澳大利 (Úc Đại Lợi), which is contracted from Chinese 澳大利亞 (Úc Đại Lợi Á, or more accurately Áo Đại Lợi Á), from Mandarin 澳大利亞 (Àodàlìyà); 澳 is read as Úc not to be confused with 奧 Áo (“Austria”)