1. 低声说;悄悄说;耳语
    When you whisper, you say something very quietly, using your breath rather than your throat, so that only one person can hear you.

whisper的近义词

    e.g. 'Keep your voice down,' I whispered...
           我轻声说：“小声点儿。”
    e.g. She sat on Rossi's knee as he whispered in her ear...
           她坐在罗西的膝盖上，听他低声耳语。

2. 私下谈论；谣传
    If people whisper about a piece of information, they talk about it, although it might not be true or accurate, or might be a secret.

whisper的意思

    e.g. Today, we no longer gasp when we hear a teenage girl is pregnant or whisper about unmarried couples who live together...
           今天，我们听到未成年少女怀孕时不会再感到惊讶，也不会再去私下谈论谁谁未婚同居。
    e.g. It is whispered that he intended to resign...
           据传他打算辞职。

3. 发出低沉而轻微的声音；沙沙（或飒飒）作响
    If something whispers, it makes a low quiet sound which can only just be heard.

    e.g. The cold breeze moved through the bushes around him, whispering just loud enough to obscure the chanting...
           冷飕飕的风吹动着他周边的矮树丛，沙沙声刚好盖过了吟唱的声音。
    e.g. The car's tires whispered through the puddles.
           穿过水坑时汽车的轮胎发出呜呜声。