-았어요/었어요
Romanisation: -asseoyo/eosseoyo
completed-action particle (past tense ending)
Example sentence
어제 학교에 갔어요.
Eoje hakgyoe gasseoyo.
I went to school yesterday.
What -았어요/었어요 means
-았어요/었어요 (-asseoyo/eosseoyo) is a Korean word meaning “completed-action particle (past tense ending)”. It belongs to the Grammar & Phrases topic and appears at Level 2, so it is one of the words worth learning early when you study Korean.