viable

Compared meaning: able to happen or work (adjective).

比较义项：某事有可能发生或可以行得通（形容词）。

• possible

  The broadest and most neutral word: just says something can happen or exist, with no comment on ease, likelihood, or practicality; often used in the pattern 'it is possible to/that'.

  语气最中性、最笼统：只表示某事有可能发生或存在，不评价是否容易或实际可行；常用于“it is possible to/that”这种句型。

  It's not possible to be in two places at the same time.

  一个人不可能同时出现在两个地方。

• feasible

  Stresses that something can be done successfully with the resources, time, or methods available; common in contexts like plans, budgets, or engineering, often questioning or assessing practicality.

  强调在现有资源、时间或方法下“能够顺利做成”；常用于计划、预算或工程等场景，常用来评估或质疑某事是否切实可行。

  The engineers are studying whether the underwater tunnel is technically feasible.

  工程师们正在研究这条海底隧道在技术上是否可行。

• viable 本词

  Emphasizes that something can work and continue successfully over time, especially plans, businesses, or options; suggests long-term soundness, not just momentary possibility.

  强调某事能够长期维持并取得成功，尤其用于方案、选项或商业活动；强调的是长期的可行性和稳健性，而不只是眼前有没有可能。

  Solar power is now a viable alternative to fossil fuels in many countries.

  在许多国家，太阳能现在已经是化石燃料的一种可行替代方案。

All three words mean something can happen or work. Possible is the most general word, with no comment on ease. Feasible means it can be done with the resources available. Viable means it can keep working successfully over time, often for plans or businesses.

这三个词都表示某件事“能够实现”，但语气强弱不同：possible 只是笼统地说“有可能”，不涉及是否容易或实际可行；feasible 强调在现有条件下“做得到、行得通”，常用于评估计划或方案；viable 强调“长期可行、能维持下去”，常用于方案、选项或商业活动，这里不比较 viable “能存活、能生长”的生物学义项。