swiftness   (Sound)

The swiftness has 1 Senses.

• swiftness, speed, fastness
• 素早さ, 速度, スピード, 速さ, 機敏さ, 迅速さ, す早さ
• a rate (usually rapid) at which something happens; "the project advanced with gratifying speed"
• 何かが起こる（通常は敏速な）速さ