This is the 12399th most frequent Russian word.
касаться
"Касаться" means "to touch" or "to concern."
In this sentence, 'касаться' is used in the figurative sense of 'to relate to' or 'to concern'. It shows involvement or relevance to the subject.
Этот вопрос касается всех нас.
This question concerns all of us.
Here, 'касаться' is used in its literal sense of 'to touch'. It means to make physical contact with something.
Не касайся горячей плиты.
Don't touch the hot stove.
In this context, 'касаться' is used more formally or abstractly, meaning 'to pertain to' or 'to affect', concerning broader or figurative implications.