Fastness Meaning in Bengali

What is the meaning of word Fastness in Bengali/Bangla ?

Defenition of word Fastness

• a secure refuge, especially a place well protected by natural features.
• the ability of a material or dye to maintain its color without fading or washing away.

Example

a remote Himalayan mountain fastness

Other Meaning of Fastness

• NOUN

  কার্কশ্য brutality toughness asperity roughness fastness
  দ্রুতি speed fastness swiftness quickness velocity celerity
  দৃঢ়তা consistency firmness constancy fastness consistence manliness
  দুর্গ castle fortress chateau tower citadel fastness
  দ্রুততা agility speed swiftness quickness celerity fastness