거였다

was the case; it was that

→ 것
phrase Rare #27,427
was the case; it was that A past-tense explanatory construction, often used to clarify or reveal what happened. 거 is a shortened form of 것이, literally “thing.”
KO: 마티나가 내 아침을 챙겨 준 거였다.
EN: It turned out that Martina had taken care of my breakfast.

스펜서포트에서는 늘 구할 수 없는 물건들을 보러 간다는 거 였다.

It meant going to Spencerport to look at things you can’t always find.

그들은 뭐랄까, 무언가를 해본 경험을 모으는 거 였다.

They were, how should I put it, collecting experiences by trying things.

마티나가 내 아침을 챙겨 준 거 였다.

Martina had made me breakfast.