This is the 1847th most frequent Russian word.
опытом
"Опытом" means "by experience" or "through experience."
In this sentence, "опытом" is in the instrumental case, indicating that it is the means or tool through which action is performed.
Он делится своим опытом с коллегами.
He shares his experience with colleagues.
Here, "опытом" denotes an obtained or acquired experience as a result of an activity.
Научное исследование обогатило меня новым опытом.
The scientific research enriched me with new experience.
In the third sentence, "опытом" refers to personal experience from which one derives lessons.