Longman Dictionary of Contemporary English homepage

Date: 1400-1500
Language: Latin
Origin: retardare, from tardus 'slow'

retard

1 verb
     
re‧tard1 [transitive]
formal to delay the development of something, or to make something happen more slowly than expected [= slow down]:
Cold weather retards the growth of many plants.
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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