star trek - What are the established ways which can or cannot harm a Changeling?

Obviously Star Trek changelings are quite robust.

I know the answers to some of these, but I'll just leave it to someone to provide a complete answer.

To harm means to kill or to do damage to a changeling that can be permanent or at least last for some period of time or may require medical intervention to repair.

Various means of attack could include, among others:

• physical attack


• physical separation into pieces


• explosives


• radiation


• extreme heat or cold


• energy weapons


• vacuum


• chemical attack


• biomedical attack


• denial of reversion to gelatinous state


• emotional abuse (jk)


• others

In canon, what do we know causes damage to a Changeling, and what doesn't cause damage?