Answer: BROADEN

AnswerCrossword Clue
BROADENExpand
BROADENMake wider
BROADENWiden out
BROADENAdd lanes to
BROADENIncrease the width of.
BROADENExtend.
BROADENExpand.
BROADENSpread.
BROADENExtend
BROADENSpread out
BROADENExpand, as one's horizons
BROADENDiversify
BROADENBecome wide
broadento make wider
broadento make wider (extending far)