This is the 425th most frequent Swedish word.
betydligt
Significantly.
Here, 'betydligt' functions as an adverb that amplifies the degree of improvement ('bättre').
Han har blivit betydligt bättre på att spela piano.
He has become significantly better at playing the piano.
In this example, 'betydligt' modifies the verb 'ökat' (increased), denoting a notable amount of increase.
Priserna har ökat betydligt under det senaste året.
The prices have increased significantly over the past year.
The word 'betydligt' is used as an adverb to modify the adjective 'större' (larger), indicating a substantial increase in size.