That has not been mixed by stirring. / Not stirred or emotionally excited.

simple past tense and past participle of unstir

Without stirring; quiet and still. / Not stirring or rousing; not inspiring the emotions.

present participle of unstir

(transitive, intransitive) Hypothetically, to undo the act of stirring or being stirred.

Third-person singular simple present indicative form of unstir

Not stirrable.

Without stirring; remaining quiet and still.