crass

kras

adjective

showing no intelligence or sensitivity.

the crass assumptions that men make about women

stupid,insensitive,blundering,dense,thick,vacuous,mindless,witless,doltish,oafish,boorish,asinine,bovine,coarse,gross,pig-ignorant,utter,sheer,downright,total,out-and-out,outright,very great,complete,absolute,thorough,perfect,blatant,unmitigated,unqualified,glaring,undisguised,naked