身體上的沒力氣
這一族就是核心畫面本身：力氣不夠用的身體。
physically weak · adjective · C2
Extremely weak in body or voice, often because you are ill, very old, or very young.
虛弱
核心畫面
One way to picture it: a body so drained of strength that it cannot push back — the hand that can't grip, the voice that can't carry across a room.
一個人身上「使不出力」的狀態。手想握卻握不緊，話想說卻傳不到房間另一頭，整個人像被抽掉了力氣，撐不住、也推不動任何東…更多收起
一個人身上「使不出力」的狀態。手想握卻握不緊，話想說卻傳不到房間另一頭，整個人像被抽掉了力氣，撐不住、也推不動任何東西。這個畫面裡最重要的不是「小」，而是「本來該有的力量沒有了」——所以老人、病人、剛出生的小嬰兒都可以是 feeble。From the word’s history
From Latin flēbilis 'to be wept over, lamentable' (from flēre 'to weep') — the word entered English via Anglo-Norman feble with the sense 'weak', so the modern core is 'weak' rather than 'tearful'.
這個字經由 Anglo-Norman feble 進入英文，更早可追到拉丁文 flēbilis「值得為之落淚的、可悲的」（來自 flēre「哭」）。有趣的是它到英文時已經是「虛弱」的意思，而不是「愛哭」——但那層「令人不忍、撐不起來」的味道還隱隱留著，所以 feeble 講的虛弱常常帶著一點讓人看了心軟或搖頭的感覺。
Wiktionary 'feeble' etymology tree (Middle English feble ← Anglo-Norman feble ← Latin flēbilis)
Two branches
力道不夠、說服不了人
把「使不出力」的畫面從身體移到一件事、一個理由、一個東西上：它同樣推不動該推動的結果。
weak/ineffective · adjective · C2
Not very good or effective; too weak to work well or to be believed.
無力的
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
feebleadj/ˈfiːbəl/
- 1
Deficient in physical strength.
- Though she appeared old and feeble, she could still throw a ball.
- Pent up in Utica he vainly forms A poor Epitome of Roman Greatneſs, And, cover’d with Numidian Guards, directs A feeble Army, and an empty Senate, Remnants of mighty Battels fought in vain.
- 2
Lacking force, vigor, or effectiveness in action or expression; faint.
- That was a feeble excuse for an example.
feebleverb/ˈfiːbəl/
- 1
obsoleteTo make feeble; to enfeeble.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。