From WordNet (r) 3.0 (2006):
hasten
v 1: act or move at high speed; "We have to rush!"; "hurry--it's
late!" [syn: rush, hasten, hurry, look sharp,
festinate]
2: move fast; "He rushed down the hall to receive his guests";
"The cars raced down the street" [syn: rush, hotfoot,
hasten, hie, speed, race, pelt along, rush along,
cannonball along, bucket along, belt along, step on
it] [ant: dawdle, linger]
3: speed up the progress of; facilitate; "This should expedite
the process" [syn: expedite, hasten]
4: cause to occur rapidly; "the infection precipitated a high
fever and allergic reactions" [syn: induce, stimulate,
rush, hasten]