トラブル

とらぶる
noun
trouble; problem
abstract
1. trouble; problem; difficulty
A problem or difficult situation, particularly in interpersonal relationships or mechanical/technical contexts.
A problem occurred with my computer.
I got into trouble with my neighbor.
Let's check in advance to avoid trouble.

Borrowed from English "trouble", but narrower. Japanese トラブル names a particular incident that has gone wrong — it is countable, it happens to you rather than being something you have, and it usually involves either a dispute between people or a malfunction. English "I'm in trouble" in the sense of being in a bad position is not トラブル.

Two main areas

COMPARED WITH 問題(もんだい): 問題(もんだい) is the broader word — an issue, a question, anything that needs solving, including one you set out to work on. トラブル is something that has gone wrong unexpectedly. A maths exercise is a 問題(もんだい) and never a トラブル.

Common collocations

Compounds: トラブルシューティング (troubleshooting), トラブルメーカー (troublemaker).