M / merto
verb frequentative transitive

merto

2nd PP mertāre · conj. 1st
mergo, a collat. form of merso
to immerse, overwhelm
to immerse, overwhelm (anteclass.): mertat pro mersat dicebant, Paul. ex Fest. p. 124 Müll.; cf. Quint. 1, 4, 14: quos hic non mertet metus, Att. ap. Non. 138, 33; 138, 2.