Lewis Short
(verb) : com-mītĭgo (con-m-), āre
* To make soft, mellow: alicui sandalio caput, humorously for contundo,Ter. Eun. 5, 7, 4 (imitated: misero mihi mitigabat sandalio caput, Turp. ap. Non. p. 343, 15; cf. also: mitis sum fustibus,Plaut. Mil. 5, 1, 31).
Charlton T. Lewis, Charles Short, A Latin Dictionary