衰减 shuāijiǎn to weaken
to weaken; to attenuate
How to remember 衰减: 衰 weak + 减 decrease = to weaken.
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How it is used
- To attenuate / weaken gradually - 信号衰减 (xìnhào shuāijiǎn) signal attenuation; 强度衰减 (qiángdù shuāijiǎn) intensity decay.
- Technical/scientific register (physics, engineering) for a measurable decline in strength.
- 衰 read shuāi. Narrower than everyday 减少 (jiǎnshǎo, decrease in amount).