adjective
retentive
rih-TEN-tiv/rɪˈtentɪv/
Tending to hold what is taken in.
The retentive sponge holds most of its water above the dish.

Etymology
Holding back becomes a capacity to keep something from being lost. The adjective first described keeping food or nourishment, and its memory sense treats the mind as holding on to what it has learned.
In context
materials retentive of infection for in the present case when infection has seized any part of a country much greater care ought to be taken that no seeds of the contagion be conveyed about
More examples
- Her retentive memory helps her recall names years later.
- Retentive soil needs less frequent watering during dry weather.
- This fabric is highly retentive of moisture and dries slowly.
Forms
Similar words
- absorbent
- Emphasizes taking in liquid rather than keeping it inside.
- tenacious
- Emphasizes holding firmly; can also describe a strong memory.