hindrances

barrier deterrent drawback handicap hitch impediment interference interruption obstacle snag stumbling block

albatross baggage bar catch check clog crimp drag encumbrance glitch gridlock hang-up impedance intervention joker limitation lock millstone restraint restriction stoppage trammel

ball and chain catch-22 cumbrance excess baggage foot dragging jam-up monkey wrench

advantage aid assistance benefit opening

freedom liberation release

advance encouragement expedition promotion push