Quick answer
Absorver takes in. Adsorver sticks to a surface.
A reliable test is to identify the job of the word before translating from English.
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What each word does
absorver
to absorb
Use absorver for taking something into the inside of a material, body, system, or mind.
adsorver
to adsorb
Use adsorver for particles adhering to the surface of a material, especially in chemistry.
How to choose
- absorver: Choose absorver if the sentence points to taking something into the inside of a material, body, system, or mind.
- adsorver: Choose adsorver if the sentence points to particles adhering to the surface of a material, especially in chemistry.
Examples
O tecido absorve agua.
The fabric absorbs water.
O carvao ativado adsorve impurezas.
Activated carbon adsorbs impurities.
Common trap
Adsorver is technical. In ordinary language, absorver is almost always the word you need.
Practice it in context
Pick one sentence from your real life and write it twice: once with absorver, then once with adsorver. If both versions feel possible, name the meaning shift.
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