galopar
gallop
gallop
to run fast (of a horse)
+
-ar
verb suffix
Galopar means to gallop and can be thought of as gallop0 + -ar1 (verb suffix1).
verb
  1. gallop
    To move or run in the manner of a horse at a gallop
    El caballo comenzó a galopar por el campo. // The horse began to gallop across the field.