何の役にも立たない

なんのやくにもたたない

of no use whatsoever, good for nothing, useless

役に立たない

やくにたたない

of no avail, useless

糞の役にも立たぬ

くそのやくにもたたぬ

completely worthless, utterly useless

役に立つ

やくにたつ

to be helpful, to be useful

立役

たてやく

leading actor, protagonist

役に立てる

やくにたてる

to put to use; to make good use of; to exploit

役立たず

やくたたず やくだたず

useless, deadhead

立ち役

たちやく

leading male role in kabuki

立役者

leading actor; star

役立つ

やくだつ

to be useful, to be helpful, to serve the purpose

役立てる

やくだてる

to put to use, to make use of, to turn to account

立て役者

たてやくしゃ

leading actor, person who acts as driving force behind something, key figure, leading spirit, central figure

毒にも薬にもならない

どくにもくすりにもならない

That will do neither harm nor good

柄にもない

がらにもない

out of character; unlike one

心にもない

こころにもない

(something) one does not really mean; insincere

引き立て役

ひきたてやく

person who makes someone else appear better, foil

役に就く

やくにつく

to be appointed to a post, to assume office

何にもならない

なんにもならない

there's no point, it's no use, it's not worth it

何処にもない

どこにもない

nowhere