What does acidify mean?
Acidify is a verb meaning to make something acidic or to become acidic — in chemical terms, to lower its pH. It is most often encountered in scientific and practical contexts: farmers acidify alkaline soil so crops like blueberries can thrive, brewers and winemakers acidify mixtures to control fermentation, and chemists acidify solutions as part of standard laboratory procedure. The word can be used transitively, as in 'vinegar acidifies the marinade,' or intransitively, as in 'the lake has been acidifying for decades.' Its most prominent modern use may be in environmental science, where 'ocean acidification' describes seawater becoming more acidic as it absorbs atmospheric carbon dioxide — a process with serious consequences for shellfish and coral reefs. Though technical in register, acidify is precise and widely understood, making it valuable wherever acidity itself is the subject of discussion.
verbTo make or become acidic; to convert something into an acid or give it acid properties, especially by lowering its pH.
- To make a substance acidic; to lower its pH.
- (Intransitive) To become acidic naturally, as soil or seawater does under certain conditions.
"Excess nitrogen fertilizer can acidify the soil over time."
"Gardeners often acidify the soil with sulfur to grow blueberries successfully."
"As the oceans absorb more carbon dioxide, they continue to acidify at an alarming rate."
The same word that describes souring milk also describes one of the biggest environmental crises of our time — oceans so full of absorbed carbon dioxide that they are literally turning to acid.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of acidify
Acidify derives from the Latin adjective acidus, meaning 'sour' or 'sharp-tasting,' combined with the verb-forming suffix -fy from Latin facere, 'to make.' The word entered English in the late 18th century, during a period when chemistry was rapidly developing its modern vocabulary. It belongs to a large family of English words built on the same Latin root, including acid, acidic, acidulous, and acidosis, all ultimately tracing back to the sharp taste that gave the root its name.
Related word forms
How acidify is actually used
Acidify is largely a technical or scientific term, common in chemistry, agriculture, oceanography, and food science. It works both transitively (to acidify something) and intransitively (something acidifies). In everyday speech, people more often say 'make sour' or 'turn acidic.'
Easily confused with acidify
Acidulate means to make slightly or mildly acidic (often of food and drink), whereas acidify implies making something distinctly or strongly acidic.