やくにたつ
to be useful, to be helpful
The thing stands up in the role you handed it rather than sitting there. Even the yak やく from 役 earns its shelf: やくにたつ.
This is one of 1,500 words in Emaki, a free spaced repetition trainer with a written mnemonic on every card.
Study 役に立つ in EmakiFree, no account needed. Your progress stays in your browser.
Emaki is not affiliated with, or endorsed by, Kaishi 1.5k or its authors. The word, reading and meaning come from the Kaishi 1.5k deck, used with their permission. The mnemonic, the note and the kanji breakdown are original work, published under CC BY-SA 4.0.