numb

Compared meaning: having lost feeling in a body part (adjective).

比较义项：麻木、失去知觉（形容词）。

• asleep

  Describes a body part that has temporarily lost feeling from prolonged pressure cutting off circulation; informal, tied to the fixed phrase 'fall asleep', and used only after a verb, never before a noun.

  指身体某部位因长时间受压、血液循环受阻而暂时失去知觉；口语化，常与固定搭配“fall asleep”连用，只能放在动词之后，不能放在名词前作定语。

  My leg fell asleep after I sat cross-legged on the floor too long.

  我盘腿坐在地板上太久，腿麻了。

• numb 本词

  A general word for loss of feeling from cold, shock, anesthesia or injury; broader in cause than 'asleep', and can be used both before a noun ('numb fingers') and after a verb ('fingers felt numb').

  泛指因寒冷、震惊、麻醉或外伤而失去知觉，起因比asleep更广泛，既可放在名词前作定语（numb fingers），也可放在动词之后作表语（fingers felt numb）。

  Her fingers felt numb after building a snowman in the cold.

  她在寒冷中堆完雪人后，手指感到麻木。

Asleep and numb both describe a body part with no feeling. Asleep means a temporary loss of feeling from pressure, as in 'my leg fell asleep'. Numb is broader, covering cold, medicine, injury, or emotional shock. Asleep's meaning 'sleeping' is not compared.

这两个词都可以形容身体某部位“麻木、失去知觉”，但语境和用法不同：asleep多指因长时间受压、血液循环受阻而产生的短暂麻木，说法较口语化；numb的适用范围更广，可以指因寒冷、麻醉、外伤甚至情绪冲击造成的麻木。这里不比较asleep最常见的“睡着的”这一义项。