落ち込んだ

felt depressed, was discouraged

→ 落ち込む
落ち込ん feel depressed, feel down + Past tense
verb · past Rare #41,256
felt depressed, was discouraged
JA: 試験に落ちて、彼は落ち込んだ。
EN: He felt depressed after failing the exam.
Conjugation of 落ち込む
Past
落ち込んだ

自分で落ち込んだんだはい出せる

You got yourself into this slump, so you can pull yourself out!

— ベルリン・天使の詩 (1987)

彼は思いっきり落ち込んだ

He was completely devastated.

まあ私の経験なんだ落ち込んだときには唯一行くべきところは上だ

Well, speaking from experience... when you're feeling down, the only place to go is up.

— アトランティス 失われた帝国 (2001)