challenge
UK[ˈtʃælɪndʒ]US[ˈtʃælɪndʒ]
n
An invitation or demand to someone to prove or justify something, especially in a competitive or aggressive context.
n
A difficult task or problem that tests someone's abilities.
v
To dispute the truth or validity of something; to question.
v
To invite someone to engage in a contest or fight.
Etymology
The word 'challenge' originates from the Old French 'chalonge' or 'chalenge', meaning an accusation, claim, or dispute. This, in turn, derived from the Latin 'calumnia', signifying a false accusation, trickery, or slander. The semantic journey from 'false accusation' to a modern 'call to contest or prove something' reflects a shift from a malicious legal charge to a more neutral or even positive test of merit. The spelling was later influenced by the related Latin verb 'calumniari' (to accuse falsely), solidifying its form in Middle English as it evolved to encompass the broader senses of summoning to a duel and presenting a difficult task.
Analysis
The word is a simplex form. It entered English as a whole from Old French, and its spelling does not neatly divide into productive, meaning-bearing morphemes in modern English.
Examples
He accepted the challenge to a debate.
Finding a solution to climate change is one of the greatest challenges of our time.
The lawyer challenged the credibility of the witness.