polega in English:

This organization relies entirely on voluntary donations.

Japan relies on Arab countries for oil.

She relies on the lion.

My father relies little on medicines.

Mastering a foreign language involves a lot of patience.

He tends to shy away from anything that involves public speaking.

this job involves...

Additive synthesis involves manually controlling harmonics, and uses only sine waves.

The game of pinball involves directing a little steel ball onto ramps and into holes with a pair of flippers.

Kendo involves dueling between two people who are each equipped with a sword-like stave made of bamboo.

A whistle involves blowing out of your mouth in a certain way.

We all have a tendency to think that the world must conform to our prejudices. The opposite view involves some effort of thought, and most people would die sooner than think — in fact they do so.

Criminal law, also known as penal law, involves prosecution for an act that has been classified as a crime.