unprotected

Compared meaning: left without covering or protection (adjective).

比较义项：没有遮盖物或保护，处于裸露、暴露或无防护的状态（形容词）。

• naked

  Naked describes something completely lacking its usual covering, often physical and visible (skin, trees, wires, flames); it has a vivid, almost literary tone and does not itself imply danger.

  naked 形容某物完全没有其通常应有的覆盖物，常用于具体可见的事物（皮肤、树木、电线、火焰），语气生动、略带文学色彩，本身并不暗示危险。

  Never light a naked flame near gasoline, since the fumes can ignite instantly.

  千万不要在汽油附近点燃裸露的火焰，因为汽油蒸气可能瞬间被点燃。

• exposed

  Exposed describes something whose covering has been removed or damaged, often by an external event, leaving it newly visible or open to the elements; it focuses on the process of losing protection.

  exposed 形容某物的覆盖物因外部事件（如损坏）而被移除，从而新近变得可见或暴露在自然环境中，侧重于失去保护这一过程本身。

  After the earthquake, several pipes were left exposed beneath the cracked pavement.

  地震过后，几根管道在裂开的路面下暴露了出来。

• unprotected 本词

  Unprotected focuses specifically on lacking defense or safety measures against harm, danger or attack, and is often used for people, systems or places facing risk rather than for physical coverings.

  unprotected 专门强调缺乏防御或安全措施以抵御伤害、危险或攻击，常用于面临风险的人、系统或地方，而不是描述实体覆盖物。

  Without a helmet, the cyclist felt completely unprotected on the busy highway.

  没有戴头盔，那位骑车人在繁忙的高速公路上感到完全没有防护。

Naked, exposed and unprotected describe something without its usual covering. Naked names a visible thing lacking cover, like skin or wires. Exposed means a covering was removed, often by weather. Unprotected means lacking safety or defense. Other figurative meanings are not compared.

这三个词都可以形容“没有遮盖或保护”的状态，但侧重点不同：naked 强调完全没有通常应有的覆盖物，多用于身体、树木、电线、火焰等具体事物，语气生动形象；exposed 强调原本被遮盖的部分因外力（如风暴、损坏）而暴露出来，侧重“暴露”这一结果和过程；unprotected 强调缺乏防御或安全措施，常用于人、系统、文件等面临伤害或危险的语境，不涉及“覆盖物”本身。这里不比较 naked 的“坦率的、未加渲染的”（如 naked truth）等引申义，也不比较 exposed 的“揭露、曝光（秘密、罪行）”等引申义，以及 unprotected 在“未采取防护措施（如 unprotected sex）”这一具体搭配中的引申用法。