innumerable

Compared meaning: too many to count (adjective).

比较义项：数量多到无法计数（形容词）。

• countless

  The most common, everyday word for an uncountably large number, often describing repeated actions or events; neutral register, natural in casual speech and writing.

  是表示数量多到无法计数的最常用、最日常的词，常用来描述反复发生的动作或事件；语域中性，口语和书面语都很自然。

  I've told my kids countless times to clean their rooms, but nothing changes.

  我已经数不清跟孩子们说了多少次要收拾房间，可什么都没有改变。

• myriad

  Emphasizes not just a huge number but also great variety; typically modifies a plural noun directly or forms a fixed collocation meaning number and variety, with a more literary or journalistic flavor.

  不仅强调数量巨大，还强调种类繁多；常直接修饰复数名词或构成表示“数量与种类兼具”的固定搭配，语气更文学化、更具新闻报道色彩。

  This neighborhood offers a myriad of restaurants, from sushi bars to taco trucks.

  这个社区提供了种类繁多的餐厅，从寿司店到玉米卷餐车应有尽有。

• innumerable 本词

  A more formal, literary synonym of countless, used in elevated or academic writing to describe an uncountably large quantity, without any variety nuance.

  是 countless 更正式、更书面化的同义词，常用于较为正式或学术性的写作中，表示数量多到无法计数，不含“种类多样”的含义。

  The professor has answered innumerable questions from curious students this year.

  这位教授今年已经回答了无数好奇学生提出的问题。

Countless, myriad, and innumerable all mean too many to count. Countless is the common, everyday word, often for repeated actions. Myriad also stresses great variety, not just huge numbers, and sounds literary. Innumerable is a formal, literary word for an uncountably large amount.

这三个词都可以表示“多到数不清”，但语气和搭配不同：countless 最常用、最口语化，innumerable 更正式、更书面化，myriad 则额外强调种类的多样性，常见于强调“丰富多样”的语境。