1.
countries, various nations
Multiple countries; emphasizes plurality or variety of nations.
国々 means "countries" or "various nations" - the plural form of 国.
Common patterns
Reduplication with rendaku (voicing): くに → くにぐに. This pattern emphasizes plurality.
Similar reduplications
Usage
More emphatic and literary than simply using 国 or 各国. Often used in formal writing or speeches about international affairs.
Related Words
Related:
国 (country (singular))
Compare:
人々 (people)
Compare:
山々 (mountains)
Compare:
日々 (days)
Compare:
木々 (trees)
Compare:
諸国 (various countries)