(îò ãðå÷. epenthesis - âñòàâêà) - âîçíèêíîâåíèå â ñëîâåäîïîëíèòåëüíîãî çâóêà ðóññêèå( ïðîñòîðå÷íûå ""íäðàâèòüñÿ"", ""ðàäèâî"").