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Challenge Definition & Meaning - Merriam-Webster
CHALLENGE Synonyms: 175 Similar and Opposite Words - Merriam-Webster
CHALLENGE | English meaning - Cambridge Dictionary
CHALLENGE Definition & Meaning | Dictionary.com
Challenge - Definition, Meaning & Synonyms | Vocabulary.com
CHALLENGE | meaning - Cambridge Learner's Dictionary
challenge noun - Definition, pictures, pronunciation and usage …
challenge verb - Definition, pictures, pronunciation and usage …
challenge verb - Definition, pictures, pronunciation and usage …
Challenge - definition of challenge by The Free Dictionary