• n. 昏睡；死氣沉沉；嗜眠（癥）

來自希臘語lethargia,遺忘，忘卻，lethe,忘記，詞源同latent,Lethe,argos,無精神，來自a-,無，沒有，-erg,工作，趨動，詞源同work,synergy.即如同游魂，無精打采，冷漠。

lethargy

lethargy: [14] Greek léthē meant ‘oblivion’ (the Romans used it for the name of a river in Hades whose water induced forgetfulness, and its influence has also been traced in changing Latin lētum ‘death’ to lēthum, source of English lethal [17]). From it was formed the adjective léthargos, which in turn produced the noun lēthargíā, source (via Latin and Old French) of English lethargy.
=> lethal

lethargy (n.)

late 14c., litarge, from Old French litargie or directly from Medieval Latin litargia, from Late Latin lethargia, from Greek lethargia "forgetfulness," from lethargos "forgetful," originally "inactive through forgetfulness," from lethe "forgetfulness" (see latent) + argos "idle" (see argon). The form with -th- is from 1590s in English.

1. Symptoms include tiredness, paleness, and lethargy.

癥狀包括疲倦、臉色蒼白、沒有精神。

來自柯林斯例句

2. After the meal, I could feel lethargy overtaking me.

飯后我昏昏欲睡.

來自《簡明英漢詞典》

3. Sleep deprivation can cause stress, loss of appetite and lethargy.

睡眠不足會導致緊張 、 沒有胃口和懶散.

來自《簡明英漢詞典》

4. She was suddenly overcome by lethargy.

她突然委靡不振.

來自《簡明英漢詞典》

5. Get your body moving to boost energy, stay supple and shake off winter lethargy.

鍛煉身體以增加活力，保持柔韌性，甩掉冬日的慵懶。

來自柯林斯例句