intentional

Compared meaning: done on purpose, not by accident (adjective).

比较义项：故意的，经过考虑而非偶然发生的（形容词）。

• deliberate

  Emphasizes careful thought or slow, controlled action before or during doing something; often describes a considered decision, or a slow, careful manner (a deliberate pace); neutral to positive tone.

  强调事前经过深思熟虑，或动作缓慢、从容、有控制感；常用来形容经过考虑的决定，或描述从容不迫的方式（如 deliberate pace，从容的步伐）；语气中性偏褒。

  He spoke in a slow, deliberate voice so that everyone in the room could follow.

  他用缓慢而从容的语气说话，好让房间里的每个人都能听懂。

• calculated

  Emphasizes strategic planning aimed at producing a specific effect, often for personal advantage; frequently used for risks, insults, or moves, and can carry a negative, scheming connotation.

  强调为达到特定效果而进行的策略性谋划，常是为了自身利益；多用于形容风险、侮辱或举动，带有算计、城府较深的负面意味。

  It was a calculated risk, but investing early gave the company a real advantage.

  这是一次经过精心盘算的冒险，但提前投资确实给公司带来了真正的优势。

• intentional 本词

  The plainest, most neutral word; simply means done on purpose rather than by accident, without implying careful planning or strategy; common in everyday talk about actions or behavior.

  是最普通、语气最中性的词，只是表示“故意做的，而非意外发生”，不含深思熟虑或策略谋划的意味，日常谈论行为或动作时最常用。

  His rude comment felt intentional, not just a careless mistake.

  他那句无礼的话让人觉得是故意的，而不只是一时疏忽。

All three mean done on purpose, not by accident. Deliberate means careful thought or slow, controlled action, not its verb sense, to discuss carefully. Calculated means strategic planning for an effect, scheming, not calculate meaning to compute. Intentional is the plainest word, meaning not accidental.

这三个词都表示“故意做某事，而非偶然”，但语气和用法有所不同：deliberate 强调事前经过深思熟虑、动作从容不迫；calculated 强调为达到特定效果而精心策划，常带负面或算计的意味；intentional 是最普通、语气最中性的说法，只是强调“并非意外”。这里不比较 calculate 的“计算”义（如计算费用），也不比较 deliberate 作动词“仔细商议”的用法。