Main entry: tenacious, recollective, retentive, long
Definition: good at remembering
Usage: a retentive mind; tenacious memory
Antonyms: unretentive, forgetful, short
Definition: (of memory) deficient in retentiveness or range
Main entry: retentive
Definition: having the power, capacity, or quality of retaining water
Usage: soils retentive of moisture
Antonyms: permeable
Definition: allowing fluids or gases to pass or diffuse through