hydratinggerund / present participle Used of substances or products that add or restore moisture.
The hydrating lotion left her skin feeling soft and supple.
La lotion hydratante a laissé sa peau douce et souple.
Gerund meaning the act or process of hydrating; treated as an uncountable noun.
Proper hydrating is essential after a long run.
Une bonne hydratation est essentielle après une longue course.