cheery

Compared meaning: happy, positive, and cheerful in mood (adjective).

比较义项：乐观开朗、心情愉快的（形容词）。

• sunny

  Describes a naturally optimistic, warm disposition, as if radiating warmth like sunshine; usually describes a person's overall character rather than a passing mood, and often pairs with words like nature, disposition or personality.

  形容天生乐观、温暖的性格，仿佛像阳光一样散发温暖；通常形容人整体的性格气质，而非一时的情绪，常与nature、disposition、personality等词搭配。

  Despite the setbacks, he has always had a sunny disposition that cheers everyone around him.

  尽管遭遇挫折，他一直保持着乐观开朗的性格，让身边的人都感到振奋。

• cheerful

  The most common, neutral word for feeling or appearing happy and positive; it can describe a person's mood, a smile, a place or an object, and fits both a momentary state and a lasting trait.

  是最常见、最中性的词，用来形容感到或表现出快乐、积极的状态；既能形容人的情绪、微笑，也能形容地方或物品，既可以表示一时的心情，也可以表示持久的性格。

  The classroom felt cheerful, with colorful posters and children's laughter filling the room.

  教室里洋溢着欢快的气氛，色彩缤纷的海报和孩子们的笑声充满其中。

• cheery 本词

  Suggests a bright, brisk, lively kind of happiness, often shown in short interactions such as a greeting or a tone of voice; slightly more casual and informal than cheerful.

  表示一种明快、轻快、活泼的愉悦感，常出现在简短的互动中，例如打招呼或说话的语气；语气比cheerful更随意、更口语化。

  He answered the phone with a cheery “good morning!” that started my day off well.

  他接电话时用轻快愉悦的语气说了声“早上好”，让我一整天的心情都好了起来。

Sunny, cheerful, and cheery can all describe a happy person, but differ. Sunny suggests a warm, optimistic character. Cheerful is the most common, neutral word, for a mood, smile, or place. Cheery suggests bright, lively happiness, often in greetings. Sunny's weather sense is not compared.

这三个词都可以形容人乐观开朗、心情愉快，但语气和搭配不同：sunny强调天生乐观、温暖的性格；cheerful是最常用、最中性的词，可以形容情绪、微笑或氛围；cheery则强调活泼轻快的愉悦感，常见于打招呼或说话语气中。这里不比较sunny表示“阳光充足的”（天气）的义项。