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PROBLEM Synonyms: 105 Similar and Opposite Words - Merriam-Webster
Problem Definition & Meaning - Merriam-Webster
PROBLEM Definition & Meaning | Dictionary.com
PROBLEMS Synonyms: 51 Similar and Opposite Words - Merriam-Webster
How to Deal With Problems: 15 Steps - wikiHow
PROBLEM | definition in the Cambridge English Dictionary
PROBLEM | definition in the Cambridge Learner’s Dictionary
PROBLEM | English meaning - Cambridge Dictionary
Problem - Definition, Meaning & Synonyms | Vocabulary.com
Problem Definition & Meaning | Britannica Dictionary