Umnyango womlilo wensimbi unokumelana nomlilo oqinileyo, ixabiso eliphakathi, ukugquma kwesandi esiphezulu kunye nokushisa ukushisa, kwaye ihlala ixesha elide. Iimveliso zentsimbi ezikwaziyo ukumelana nomlilo zisetyenziswa ikakhulu kwizakhiwo zoshishino kunye nezakhiwo zasekuhlaleni ngenxa yesitayile sazo esimnandi kunye nenkangeleko engathandekiyo.