ACIDULATE

sour, acidify, acidulate, acetify

(verb) make sour or more sour

Source: WordNet® 3.1

Etymology

Verb

acidulate (third-person singular simple present acidulates, present participle acidulating, simple past and past participle acidulated)

(transitive) To make slightly or moderately acid; to acidify.

(transitive) To make sour in a moderate degree; to sour somewhat.

(transitive) To use an acidic catalyst, with the chemical change being emphasised over the importance of the change in pH. Used in the processing of biodiesel co-products.

Source: Wiktionary

A*cid"u*late, v. t. [imp. & p. p. Acidulated; p. pr. & vb. n. Acidulating.] Etym: [Cf. F. aciduler. See Acidulous.]

Definition: To make sour or acid in a moderate degree; to sour somewhat. Arbuthnot.

Source: Webster’s Unabridged Dictionary 1913 Edition