weakling

/ˈwiːklɪŋ/
noun
  1. A person or animal that is physically weak or lacking strength.
    • The sickly puppy was the weakling of the litter.
    • He was a weakling as a child, but later became a strong athlete.
    • The bully picked on the weakling in the playground.
  2. A person who lacks courage, willpower, or determination.
    • Don't be a weakling—stand up for what you believe in.
    • Only a weakling would let fear control their decisions.
    • She called him a weakling for giving up so easily.
Antonyms