adjective

porous

porous, permeable

The porous rock allows water to pass through.

The porous rock allows water to pass through.

The country has a porous border.

The country has a porous border.

((adjective)) + ((noun)) porous A porous material absorbs liquid easily.

Synonyms: permeable, absorbent; Antonyms: impermeable, nonporous

From Latin `porus` 'pore, small opening.' The suffix `-ous` means 'full of.' So, 'full of pores.'

Imagine pouring water on a sponge. The sponge is porous because it has many pores.

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