nausea

Compared meaning: the feeling of wanting to vomit (noun).

比较义项：恶心、想吐的感觉（名词）。

• sickness

  Sickness is the everyday, more British way to name this feeling, often built into fixed phrases like morning sickness or travel sickness; it can also loosely suggest actual vomiting, not just the sensation.

  sickness是更日常、更英式的说法，常出现在表示“孕吐”或“晕车”的固定搭配中；它也可以宽泛地指代真正的呕吐，而不仅仅是想吐的感觉。

  Morning sickness kept her running to the bathroom every single day.

  孕吐让她每天都得往卫生间跑。

• nausea 本词

  Nausea is the more formal, almost clinical term for wanting to vomit, typically uncountable and paired with words like wave or feeling; it rarely appears in fixed compounds such as morning sickness.

  nausea是更正式、接近医学用语的说法，表示想吐的感觉，通常作不可数名词，常与“一阵”或“一种感觉”等词搭配使用；它很少出现在类似“孕吐”那样的固定搭配中。

  A wave of nausea swept over him as the boat rocked violently.

  船剧烈摇晃时，一阵反胃感向他袭来。

Sickness and nausea both mean wanting to vomit, but differ in tone. Sickness is everyday and British, often in phrases like morning sickness. Nausea is more formal, almost clinical, usually uncountable, and often follows words like wave. Sickness's other meaning, illness, is not compared here.

在表示“恶心、想吐的感觉”时，sickness和nausea意思相近，但语域不同：sickness更口语化、更英式，常出现在“晨吐”“晕车”等固定说法里；nausea更正式，接近医学用语，常见搭配是“一阵nausea”。这里不涉及sickness表示“疾病”的其他义项。