zgłębnik in inglese:

Probe into the cause of the accident.

We probe people's blood in our lab.

If you probe deeper, significant differences emerge.

Many of the speakers supported the Polish government and criticised the European Parliament for announcing a probe on the actions of the Polish government

Do you remember the probe into the British security services?

President Trump responded today to word that he demanded Robert Mueller’s ouster last June as special counsel in the Russia probe by saying it is all fake news.

You can find the Big Dipper easily.