Quote Originally Posted by krobatshov
Quote Originally Posted by Spiderkat
The suffix ся makes the verb whether reflexive, passive or intransitive. And sometimes the verb has a slightly or complete different meaning. Also, some verbs exist only with the suffix.
Thank you
For these reasons (that verbs can become reflexive, passive or intransative) I'm now asking you

More precisely: are there kinds of websites showing which verbs can be used passive, too?

The transitive verbs (vt) can be passive - verbs that can take direct objects, intransitive verbs can't be passive (vi).