Of or concerning this or that.

Roget 9: relatively etc. adj.; pertinently etc. 23.    thereof; as to, as for, as respects, as regards; about; concerning etc. v.; anent; relating to, as relates to; with relation, with reference to, with respect to, with regard to; in respect of; while speaking of, a propos of [Fr.]; in connection with; by the way, by the by; whereas; for as much as, in as much as; in point of, as far as; on the part of, on the score of; quoad hoc [Lat.]; pro re nata [Lat.]; under the head of etc. (class) 75, of; in the matter of, in re.    ... show more

From that circumstance or source.

synonyms: thence, therefrom.