önlemek in English:

They confirmed the importance of strengthening global precautions in order to prevent devastating losses.

prevents data leakage

Governments can prevent terrorism by fighting countries that support terrorist organisations.

If you say that you cannot help doing something, you mean you cannot prevent or avoid it.

In order to prevent a further drop of the Japanese currency, the Bank of Japan intervened in the market to support it at around 150 yen to the dollar.

To prevent hijacks, all carry-on baggage is carefully inspected.

In the event that asbestos-covered mesh is found, ensure its safety by damping the asbestos portion to prevent dust release and wrapping in a plastic bag.

In short some guns have excellent security systems to prevent accidental firing (e.g. when dropped), others don't.

Educate against hate. The verb prevent means "to keep something from happening,"

prevent [a fire, disaster, a disease, an illness, the spread of [disease] to [others, the rest of the body], it (from) happening (again), further damage, such [problems, attacks, abuses] from occurring again, unauthorized access (to) prevent sb from [ing]

the general principles of risk prevention and with the safety and health regulations applying at the construction site and that they monitor work procedures to ensure proper application

Hobbyists must keep their machines flying lower than 400 feet (122 meters) and at least 5 miles (8 kilometers) from airports to prevent conflicts with manned aircraft.

They inspect the facilities that are insured and suggest improvements to prevent losses.

Maintaining a good support network is a terrific way to prevent the formation of bad habits.

preventing trafficking of women and children

An expert is someone who knows some of the worst mistakes that can be made in his field, and how to avoid them.

avoid confrontation

You really ought to think before you open your mouth, you'd avoid a lot of misunderstandings that way.

He spoke of sex in a rather businesslike manner, which was how he tried to avoid talking about his problems with intimacy.

Friendly Reminder: Please keep in mind the closing time of the line you need to switch to, so as to avoid delays in your trip.

When there were unexpected expenses in the household of me and my wife, we could not avoid pawning our belongings.

A new book expected to come out this semester is about how to avoid financial problems in difficult times.

However, I recommend that you take the JR Narita Express (a train leaves every 30-60 minutes from the airport), to avoid the complexity of changing trains.

The only useful knowledge is that which teaches us how to seek what is good and avoid what is evil.

If feeling sick of the world could by itself grant saintliness, I don't see how I could avoid canonization.

White lies could help us to be diplomatic and avoid hard feelings and arguments which can ruin a day - or a friendship.

In some situations, telling a white lie could be used to avoid people to be disappointed or get angry by or with someone.

If a high hill stood between A and B, it was important to decide whether the line should climb over it, pierce it with a tunnel, or make a detour to avoid it.

Walakum-us-Salam, Al-Sayib! Dima replied, but raised the volume on his phone this time, so as to avoid making this a duplicate sentence. "What are you up to these days?"

Crews must take precautions to avoid being contaminated or to avoid releasing contamination in the ground.