n. 要塞, 巩固, 迅速

[医] 抗拒性

Fastness \Fast"ness\, n. [AS. f[ae]stnes, fr. f[ae]st fast. See
{Fast}, a.]
1. The state of being fast and firm; firmness; fixedness;
security; faithfulness.

All . . . places of fastness [are] laid open. --Sir
J. Davies.

2. A fast place; a stronghold; a fortress or fort; a secure
retreat; a castle; as, the enemy retired to their
fastnesses in the mountains.

3. Conciseness of style. [Obs.] --Ascham.

4. The state of being fast or swift.