widen
verb.
become broader or wider or more extensive
The road widened
verb.
make (clothes) larger
Let out that dress--I gained a lot of weight
Synonym: let out
verb.
make wider
widen the road
verb.
extend in scope or range or area
The law was extended to all citizens|widen the range of applications|broaden your horizon|Extend your backyard
Synonym: broaden, extend
Antonym: narrow