adjective

(of a person or their clothes) unfashionable and unstylish in appearance (typically used of a woman).

she could achieve the kind of casual chic which made every other woman around her look dowdy

unfashionable,frumpish,frumpy,drab,dull,old-fashioned,outmoded,out of style,not smart,inelegant,badly dressed,ill-dressed,shabby,scruffy,faded,untidy,dingy,frowzy,sad,tacky,mumsy,antwacky,daggy