regarding
preposition
rɪˈɡɑːdɪŋ 
rɪˈɡɑːrdɪŋ concerning somebody/something; about somebody/something
She has said nothing regarding your request.Call me if you have any problems regarding your work.
Definition of regarding preposition from the Oxford Advanced Learner's Dictionary
rɪˈɡɑːdɪŋ rɪˈɡɑːrdɪŋ 