(adv.) In a parenthetical manner; by way of parenthesis; by parentheses.

a propos about ad rem adapted admissible against anent appertaining applicable applying apposite appropriate apropos of apt as for as regards as respects as to becoming befitting belonging by the by by the way concerning dovetailing en passant felicitous fit fitted fitting for example geared germane happy in passing in point in re in reference to in respect to incidentally involving just right likely material meet meshing on the button opportune par exemple parenthetically pat pertaining pertinent proper qualified re regarding relevant respecting right seasonable sortable speaking of suitable suited suiting tailored to the point to the purpose touching toward with respect to