keep from happening or continuing:
promote,
facilitate,
assist,
continue,
cause,
abet,
help,
open,
forward,
liberate,
let go,
heat,
permit,
allow,
push,
advance,
approve,
aid,
free,
release,
support,
warm,
encourage.
social:
let.
noun:
advance,
unclog,
nurture,
abet,
aid,
further,
assist,
ease,
leave,
smooth,
facilitate,
forward.