concerning
From Longman Dictionary of Contemporary Englishconcerningcon‧cern‧ing /kənˈsɜːnɪŋ $ -ɜːr-/ ●●○ W3 preposition ABOUTabout or relating to calls from young children concerning lost pets the facts concerning Marr’s car crash► see thesaurus at aboutRegisterIn everyday English, people usually say about rather than concerning:I’ve already written to him about the problem.Examples from the Corpusconcerning• We have several questions concerning the report.• The police are anxious for any information concerning the woman's whereabouts.