energetic

Compared meaning: full of energy or effort (adjective).

比较义项：精力充沛、有活力（形容词）。

• vigorous

  Vigorous describes an action performed with great physical force or strength, such as a forceful shake, scrub, or protest; it focuses on the power of the action, not the doer's mood.

  vigorous 形容动作本身用力、有力量，比如用力摇晃、用力擦洗或强烈抗议；侧重动作的力度，而不是做事人的情绪。

  He gave the old rug a vigorous shake to get all the dust out.

  他用力摇晃那块旧地毯，把灰尘都抖了出来。

• energetic 本词

  Energetic describes a person or animal that naturally has a lot of energy and enthusiasm, often about mood or personality rather than one forceful action.

  energetic 形容人或动物天生精力充沛、充满热情，侧重整体的精神状态或性格，而不是某一个用力的动作。

  The children were so energetic that they never stopped running around the playground.

  孩子们精力太旺盛了，在操场上跑个不停。

• brisk

  Brisk describes a fast, lively pace of movement, such as walking, or a lively pace of business, emphasizing quickness and liveliness rather than strength or effort.

  brisk 形容动作（如走路）或生意等的节奏快而有活力，侧重速度和轻快感，而不是力量或费力程度。

  The morning air was cold, so we walked at a brisk pace to warm up.

  早晨的空气很冷，我们快步走以取暖。

• strenuous

  Strenuous describes a task or activity that itself demands great physical or mental effort, focusing on how hard the task is, not on how much energy the person doing it has.

  strenuous 形容任务或活动本身十分艰巨、需要付出很大力气，侧重任务有多难，而不是做事人有多少精力。

  Hauling heavy boxes up five flights of stairs was strenuous work for the movers.

  把沉重的箱子搬上五层楼，对搬运工来说是很费力的工作。

Vigorous, energetic, brisk, and strenuous relate to energy or effort. Vigorous describes a forceful action, not the doer's mood. Energetic describes a person full of energy. Brisk describes a fast, lively pace. Strenuous describes a task needing great effort. Not covered: brisk meaning cold weather.

这四个词都与“精力”或“费力”有关，但描述对象不同：vigorous 强调动作本身用力、充满力量；energetic 强调人（或动物）本身精力旺盛、充满热情；brisk 强调动作或步伐快速而有活力；strenuous 则强调任务本身艰巨、需要付出很大力气，而不是形容做事人精力充沛。另外，brisk 还有“（天气）干冷清爽的”意思，这里不作比较。