What is the meaning of Insto?

to stand upon, set foot on

to be nearby, close to, be imminent

to assail, press upon, harass

to urge, pursue, insist, to be intent upon

to urge (forward), ply

to be pressing, draw nigh, approach, threaten

first-person singular present indicative of instar

first-person singular present indicative of instar

Source: wiktionary.org