concerning
v.v. about or relating to a specific subject. You use this word in formal writing or speech to introduce what you are talking about.
v. relating to or regarding a particular subject. Functions as a formal alternative to 'about' or 'regarding'.
I have some questions concerning the new project.
The manager sent an email to all staff members concerning the changes to the holiday policy.
The committee published a detailed report concerning the environmental impact of the proposed highway, highlighting several risks to local wildlife habitats.
From concern + -ing. The adjective and preposition follow from the verb.
Typically introduces a noun phrase; more formal than 'about'.
We discussed concerning the problemWe discussed the problemLearners often use 'concerning' after 'discuss', but 'discuss' is transitive and takes a direct object without a preposition.