To convert into acid or vinegar.
To turn acid
To supplement (a composition) with additional instruments, especially strings.
To make pure and salubrious by destroying noxious matter.
To make warm and fertile.
To restore to purity; to free from taint.
To become sweet.
To make less painful or laborious; to relieve.
To soften to the eye; to make delicate.
To make sweet to the taste.
To make more attractive; said of offers in negotiations.
To make (more) pleasant or to the mind or feelings.
To make mild or kind; to soften.