大國

a power (i.e. a dominant country)

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

surname Guo

country / nation / state / national / CL:個|个[ge4]

superpower

South Korean Grand national party

ruling a large nation is like cooking a small delicacy (idiom) / effective government requires minimal intervention

military nuclear power

a nuclear power (country)