飞速 fēisù swift
swift; rapidly
How to remember 飞速: 飞 to fly + 速 prompt = swift.
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How it is used
- At high speed, rapidly - 飞速发展 (fēisù fāzhǎn) to develop at breakneck speed, 飞速增长 (fēisù zēngzhǎng) to grow rapidly.
- An adverb intensifier meaning "as fast as flying"; mostly modifies development/growth/change.
- More vivid than 快速 (kuàisù); emphasizes dramatic swiftness.