prep. 25B6; preposition CONCERNING, as regards, with/in regard to, with respect to, with reference to, relating to, respecting, re, about, apropos, on the subject of, in connection with, vis-à-vis.
REGARDING
Meaning of REGARDING in English
Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012