thick-headed russian
дубо́вый
oak, oaken, of oak
coarse, crude, clumsy, thick-headed
tough, hard
твердоло́бый
thick-headed, chuckle-headed, thick-skulled, dull-witted
oak, oaken, of oak
coarse, crude, clumsy, thick-headed
tough, hard
thick-headed, chuckle-headed, thick-skulled, dull-witted