useful

useful adjective uk/ˈjuːsfəl/ us
A2 helping you to do or achieve something

полезный
useful information a useful course for students come in useful UK
to be useful and help someone do or achieve something, especially when there is nothing else to help them

пригодиться
You should keep that paint - it might come in useful . useful ly adverb

с пользой
useful ness noun [ U ]

польза