unlimited

Compared meaning: having no limit or end (adjective).

比较义项：没有限度、没有尽头的（形容词）。

• infinite

  More formal and often used in mathematical, scientific, or philosophical contexts to describe space, time, or quantity without end; rarely used for plans, permissions, or personal traits.

  更正式，常用于数学、科学或哲学语境，描述没有尽头的空间、时间或数量；很少用于计划、许可或个人特质。

  Scientists cannot agree whether the universe is truly infinite or bounded.

  科学家们无法一致认定宇宙究竟是真正无限的还是有边界的。

• unlimited 本词

  Emphasizes that a specific restriction or cap has been removed; common in commercial, technical, or official contexts such as data plans, memberships, or funds, implying limits existed before.

  强调某项具体的限制或上限被取消；常见于商业、技术或官方语境，例如流量套餐、会员资格或资金，暗示之前存在限制。

  Their new mobile plan gives customers unlimited data every single month.

  他们的新手机套餐每月为顾客提供不受限制的流量。

• limitless

  Emphasizes vast potential or possibility, often used for abstract qualities like imagination, creativity, or ambition; more emotive and inspirational, and less used for exact physical measurements.

  强调巨大的潜力或可能性，常用于想象力、创造力或志向等抽象事物；语气更具感染力和鼓舞性，较少用于精确的物理测量。

  Young children often assume their imagination and creativity are limitless.

  小孩子常常认为自己的想象力和创造力是无限的。

All three mean having no limit, but differ. Infinite is formal, for math, science, or philosophy, describing space or time. Unlimited stresses a specific restriction has been removed, common in business, like data plans. Limitless is inspirational, used for potential or imagination, not exact amounts.

这三个词都表示“没有限度”，但语域和常用场景不同：infinite 更正式，多用于数学、科学或哲学语境；unlimited 强调某项具体限制被取消，多见于商业或官方场合；limitless 语气更具鼓舞性，多用于形容潜力、想象力等抽象事物。