架空

架空	jià kōng	to build (a hut etc) on stilts / to install (power lines etc) overhead / (fig.) unfounded; impractical / (fig.) to make sb a mere figurehead
架	jià	to support / frame / rack / framework / classifier for planes, large vehicles, radios etc
空	kōng	empty / air / sky / in vain
空	kòng	to empty / vacant / unoccupied / space / leisure / free time