acid

a chemical substance that tastes sour and turns blue litmus paper red, or a solution containing such a substance

ácido (químico)

Collocations acid rain · stomach acid

• The water is contaminated with acid.

  El agua está contaminada con ácido.

a person who behaves in a way that seems unfriendly or unkind, especially towards someone younger or less powerful than themselves

persona agresiva o desagradable

Collocations acid tongue · acid remarks

• He's an acid towards younger colleagues.

  Es una persona agresiva hacia los colegas más jóvenes.