i Register
In some senses, concerning is marked as obsolete. Watch for register when choosing this word.
adj
Causing concern; worrying.
It's very concerning that our neighbour seems to be crying very loudly these days.
Important.
So great and so concerning truth.
prep
Regarding, respecting.
Physically, everything is perfect, but concerning your mental state, you have some problems.
The Lord hath spoken good concerning Israel.
noun
That which one is concerned in; one's business.
We shall write to you, / As Time and our Concernings shall importune, / How it goes with us, and do look to know / What doth befall you here.