be behind

decrease diminish fail fall off falter slacken slow trail wane

dally dawdle dillydally drag ebb flag hobble idle inch jelly limp linger loiter lounge plod poke procrastinate retard saunter shuffle slouch stagger stay straggle tail tarry tool trudge

drag one's feet get no place fast hang back inch along lose strength put off slow up

advance complete do finish go hasten hurry rise run rush