Õnnitlesin
"Õnnitlesin" is the past tense, first-person singular form of the Estonian verb "õnnitleda". The verb "õnnitleda" means "to congratulate" in English. Therefore, "õnnitlesin" translates directly to "I congratulated". This word is used in Estonian to express that the speaker has offered congratulations to someone.
For example, if someone achieved a goal or experienced a positive event, one might say "Ma õnnitlesin