What does 그랬구나 mean?
그랬구나 (geu-raet-gu-na) means: Oh, so that's what happened / I see. This is validation, not agreement.
This is validation, not agreement. It doesn't say 'you were right' — it says 'I now understand your experience,' which is exactly what someone venting wants to hear before any advice.
Related words in Top N Listicles
왜 그랬대 wae geu-raet-dae저런 jeo-reon큰일 날 뻔했네 keun-il nal ppeon-haet-ne세상에 se-sang-e진짜 속상하겠다 jin-jja sok-sang-ha-get-da