Questions & Answers about Βρήκαν την ουσία στο νερό.
Βρήκαν is the 3rd person plural aorist active form of βρίσκω (to find).
So it means they found.
A few important points:
- aorist = a simple completed past action
- 3rd person plural = they
- Greek often does not need an explicit subject pronoun, because the verb ending already shows who did the action
So Βρήκαν by itself already tells you they found.
Greek very often omits subject pronouns when they are not needed.
In English, you must say they found.
In Greek, the verb form βρήκαν already includes the idea of they, so adding αυτοί (they) is usually unnecessary unless you want emphasis or contrast.
So:
- Βρήκαν την ουσία στο νερό. = They found the substance in the water.
- Αυτοί βρήκαν την ουσία στο νερό. would sound more like They were the ones who found the substance in the water.