retentive

adjectives

good at remembering

"a retentive mind"; "tenacious memory"

long, recollective, retentive, tenacious

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antonym

having the capacity to retain something

retentive

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pertains to

having the power, capacity, or quality of retaining water

"soils retentive of moisture"

retentive

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preventing especially liquids to pass or diffuse through

"impermeable stone"; "an impermeable layer of scum"; "a coat impermeable to rain"