Is it ensure, insure, or assure?
late 14c., gaspen, of uncertain origin, perhaps from Old Norse geispa "to yawn," or its Danish derivative gispe "gasp," which probably are related to Old Norse gapa (see gape). Related: Gasped; gasping.
1570s, from gasp (v.).
1. Graph Algorithm and Software Package. 2. General Activities Simulation Program. 3. General Aerodynamic Simulation Program. (2003-09-27)