smoothly
US /ˈsmuːð.li/
UK /ˈsmuːð.li/

1.
in a way that is even and without sudden movements or changes
:
•
The car glided smoothly over the newly paved road.
•
The transition between scenes was handled very smoothly.
2.
without problems or difficulties
:
•
The project went smoothly from start to finish.
•
Everything is running smoothly now that we've fixed the bug.