Is it ensure, insure, or assure?
"to run rapidly," 1845, frequentative of skite "to dart, run quickly" (1721), perhaps from a Scandinavian source (cf. Old Norse skjota "to shoot, launch, move quickly, avoid (a blow)," or Norwegian dialectal skutla "glide rapidly"); see skittish. As a noun from 1905.
: some hanging on the sides of the Jeep, ''skitching,'' or dragging their feet through the powder (1990s+ Students)