noun
Refers to a decrease in numbers, performance, or economic indicators.
先月の売り上げの落ち込みが心配だ。
I'm worried about last month's drop in sales.
景気の落ち込みが続いている
The economic downturn continues.
noun
depression; low spirits; feeling down
Describes a mental state of sadness or discouragement.
失恋のあと、しばらく落ち込みがひどかった。
After the breakup, I was really depressed for a while.
彼の落ち込みようを見て、みんな心配した。
Seeing how down he was, everyone got worried.
Verb form meaning 'to fall into' or 'to feel depressed'. 落ち込み is the noun derived from this verb.
Noun form of the verb 落ち込む (ochikomu), from 落ちる (ochiru, 'to fall') + 込む (komu, 'to go into').