This is the 12284th most frequent Russian word.
испытывает
"Experiences" or "feels."
In this sentence, 'испытывает' is used to express the experience of a positive emotion, specifically joy.
Она испытывает радость, когда видит своих друзей.
She feels joy when she sees her friends.
Here, 'испытывает' refers to the action of testing or trying out objects to verify their functionality or quality.
Он испытывает новые устройства перед производством.
He tests new devices before production.
In this context, 'испытываю' represents experiencing a feeling or concern, specifically doubt.