taper
verbUK /ˈteɪpə/
US /ˈteɪpər/
To become narrower or thinner at one end.
The candle tapers at the top to a thin point.
OTHER MEANINGS
2. To slowly become less in amount or strength.
The rain began to taper off by evening.
3. A thin candle.
She lit a taper on the table.
4. A gradual decrease in amount.
The doctor suggested a taper of the medicine over two weeks.