challenge

/ˈtʃælɪndʒ/
noun
? ?

Definition

1

A difficult or demanding situation that requires great effort or skill to overcome

Completing a marathon is a huge challenge, both physically and mentally.

2

A call to someone to participate in a competition or contest, or to prove themselves in some way

The team accepted the challenge and went on to win the tournament.

Synonyms

obstacleImplies something that blocks or hinders progress testOften implies a formal or official evaluation of someone's abilities trialCan imply a difficult or trying experience, often with a sense of experimentation

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