This is the 757th most frequent Estonian word.
tugevalt
"Strongly" or "firmly."
Here, 'tugevalt' modifies 'closed', indicating the firmness of the closure.
Uks oli tuulega tugevalt kinni.
The door was tightly closed due to the wind.
The word 'tugevalt' describes the intensity of the action 'hugging'.
Ta kallistas mind tugevalt.
He hugged me strongly.
In this context, 'tugevalt' qualifies 'ran,' emphasizing the effort or vigor of the action.