ensure ＝ make sure

/ɪn'ʃƱə(r)/　/ɪn'ʃƱr/   verb

★ to make sure that something happens or is definite

・ensure something　We are working to ensure the safety of people in the city.

・The book ensured his success.

・We must take steps now to ensure the survival of these animals.

・ensure somebody something   Victory ensured them a place in the final.

・The system ensures all children equal access to education.

・ensure something for somebody   The system ensures equal access to education for all children.

・ensure (that)...   The government needs to ensure (that) worker's rights are respected.

・Rent rises were limited in order to ensure that housing remained affordable.

definite　/'defɪnət/　adj)はっきりした･明白な･確信した･確定した

rent rises  家賃上昇

remain 存在しつづける･～のままでいる

Eating a balanced diet can help ensure you get the necessary vitamins for good health.

British Airways do everything they can to ensure flights are kept on schedule.

The hotel offers a shuttle service to ensure that guests make it to the airport on time.

We have to ensure that this kind of accident will not happen again.