verb

make or become larger or more extensive.

they have renovated and enlarged the four-storey building

make/become bigger,make/become larger,make/become greater,increase in size,grow,expand,extend,amplify,augment,build up,add to,supplement,magnify,intensify,multiply,stretch,swell,distend,bloat,bulge,dilate,snowball,mushroom,blow up,puff up,fatten,fill out,balloon,widen,make/become wider,broaden,make/become broader,lengthen,elongate,make/become longer,deepen,make/become deeper,thicken,make/become thicker,top up,jumboize,wax,tumefy,intumesce,protuberate