acid

B2 Topic:Materials & Substances

US /ˈæsəd/ UK /ˈæsɪd/ See IPA manual

Freq #4651

Meanings

1

noun
A chemical substance, often sour or corrosive, that reacts with bases and can dissolve metals.

The lab stores strong acids in a locked cabinet.
2

adj
Having a sour, sharp taste like vinegar or lemon.

The wine had an unpleasantly acid taste.
3

adj
Sharp and unkind in tone.

His response was harsh and acid.

Thesaurus

Synonyms

2 adj · having a sour, sharp taste... sour tart

3 adj · sharp and unkind in tone. sour biting

More acidic

Opposites

alkali alkaline base

Word family

Forms acidityacidssubacid

Derived forms acid-baseacid-fastnessacid-freeacid-stableacid-tonguedacid-washacid-washableacidaemiaacidcoreacidemiaacidergicacidimetre

Related forms acerbicaceticacro-ph

Etymology tree Proto-Indo-European *h₂eḱ-der. Latin aceō Proto-Indo-European *dʰeh₁-der. Latin -idus Latin acidusbor. French acidebor. English acid From French acide, from Latin acidus (“sour, acid”), from aceō (“to be sour”). Doublet of agita.

*h₂eḱ- Proto-Indo-European acide French acidus Latin

View etymology graph ->

Topics

Materials & Substances

External links

# acid

**Type:** Word
**Level:** B2
**Part of speech:** noun, adj
**IPA (US):** /ˈæsəd/
**IPA (UK):** /ˈæsɪd/
**Frequency rank:** 4651

## Meanings
1. A chemical substance, often sour or corrosive, that reacts with bases and can dissolve metals.
2. Having a sour, sharp taste like vinegar or lemon.
3. Sharp and unkind in tone.

## Examples
- The lab stores strong acids in a locked cabinet.
- The wine had an unpleasantly acid taste.
- His response was harsh and acid.

## Synonyms
- acidic

## Antonyms
- alkali
- alkaline
- base

## Derived Forms
- acid-base
- acid-fastness
- acid-free
- acid-stable
- acid-tongued
- acid-wash
- acid-washable
- acidaemia
- acidcore
- acidemia
- acidergic
- acidimetre

## Related Forms
- acerbic
- acetic
- acro-
- ph

## Roots and Affixes
- Root: *h₂eḱ-
- Root: acide
- Root: acidus

## Etymology
Etymology tree Proto-Indo-European *h₂eḱ-der. Latin aceō Proto-Indo-European *dʰeh₁-der. Latin -idus Latin acidusbor. French acidebor. English acid From French acide, from Latin acidus (“sour, acid”), from aceō (“to be sour”). Doublet of agita.

## AI Etymology
Acid comes from French acide, from Latin acidus (“sour, acid”), from aceō (“to be sour”). Doublet of agita. The historical line also includes Proto-Indo-European *h₂eḱ-.

## Topics
- Materials & Substances

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acid

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