smoother
adjectiveUK /ˈsmuːðə/
US /ˈsmuːðər/
More flat and even, with no bumps.
This road is smoother than the old one.
OTHER MEANINGS
2. Easier and with fewer problems.
The new plan made the trip smoother.
3. A tool used to make a surface flat.
He used a smoother to finish the wall.
4. More relaxed and polite in manner.
Her voice was smoother on the phone.