This is the 837th most frequent Estonian word.
tõeliselt
"Truly" or "really."
The word 'tõeliselt' is used as an adverb to intensify the adjective 'ilus', emphasizing the degree of beauty.
See oli tõeliselt ilus päev.
It was a truly beautiful day.
In this sentence, 'tõeliselt' modifies the adverb 'veenvalt', strengthening the description of how convincingly the person spoke.
Ta kõneles tõeliselt veenvalt.
He/she spoke truly convincingly.
Here, 'tõeliselt' functions as an adverb to reinforce the sincerity of the verb 'hindan' (I appreciate).