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parallel

3 verb
     
parallel3 past tense and past participle paralleled, present participle paralleling also parallelled, present participle parallelling British English [transitive] written
if one thing parallels another, they happen at the same time or are similar, and seem to be related:
The rise in greenhouse gases parallels the reduction in the ozone layer.
His career parallels that of his father.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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