The word "weakling" is a transparent English compound formed from the native adjective "weak" and the noun-forming suffix "-ling." The root "weak" descends from the Proto-Germanic waikwaz-, meaning "pliant" or "yielding," which itself derives from the Proto-Indo-European root weik- meaning "to bend" or "to wind." The suffix "-ling" is also of Germanic origin, commonly used to denote a person characterized by the quality of the root word, often with a diminutive or contemptuous sense. Thus, the literal construction "one who is weak" evolved directly into the modern abstract meaning of a person lacking physical strength or moral fortitude, carrying a connotation of pity or mild contempt.

Structure: weak (feeble) + ling (one belonging to a specified group) - weak: From Old English wāc (pliant, yielding, weak), of Germanic origin. Functions as the core adjective root. - ling: From Old English -ling, a suffix forming nouns, often denoting a person connected with the base word (e.g., hireling, underling). Functions as a diminutive or pejorative noun-forming suffix.