This is the 387th most frequent Estonian word.
täielikult
Completely; fully.
Here, 'täielikult' is used to emphasize the complete recovery, modifying the verb 'taastub' (recovers).
Ta taastub täielikult pärast operatsiooni.
He will fully recover after the surgery.
The word 'täielikult' is used here as an adverb modifying the verb 'toetan' (support) to express complete agreement or support.
Ma toetan seda ideed täielikult.
I fully support this idea.
In this sentence, 'täielikult' modifies 'katki' (broken), denoting the extent or degree to which the car is broken.