-n-Infix used to denote an action (not lasting); becomes -m- in front of b, m, paccubō (“I lie”) + -n- → accumbō (“I recline, lie down”)Infix used to denote a lasting action; becomes -m- in front of b, m, piugō (“I tie”) + -n- → iungō (“I tie for a long time”)coniugō (“I tie firmly”) + -n- → coniungō (“I tie firmly for a long time”)