how do you say"trouble"

I found a link that may help you. http://www.japanese-symbols.org/japanese-word-for-trouble I hope this helps.

The most common word used for this purpose is: 危ない - abunai Let's see an overview: Trouble - 危ない - abunai (you can also use: やばい - yabai, which is informal) Dangerous - 危険 - kiken (or you can also use those for trouble in some situations) Book - 本 - hon Math - 数学 - suugaku