ad.

1. 很少，難得
   She rarely visits her aunt.

   她難得去看望姨媽。

2. 異乎尋常地，極度
   a rarely beautiful mountain scene

   極其秀麗的山景

3. 特別嫻熟地，出色地

adv.

1. not often; seldom.
2. archaic remarkably well.
   ▸to an unusual degree.