From Wiktionary, the free dictionary
gratulo
- first-person singular present indicative of gratular
gratuli + -o
- IPA(key): [ɡraˈtulo]
- Rhymes: -ulo
- Hyphenation: gra‧tu‧lo
gratulo (accusative singular gratulon, plural gratuloj, accusative plural gratulojn)
- congratulation
