1. past tense and past participle of smoothen; made smooth or smoother
Usage: primarily used in Indian English and some other varieties

Examples

• The carpenter smoothened the wooden surface with sandpaper.
• She smoothened her hair before the interview.
• The road was smoothened after the construction work.
• He smoothened the wrinkles from his shirt.
• The cream smoothened her rough skin over time.
• The waves had smoothened the pebbles on the beach.