To lessen; to dull; to make less intense (said of emotions and non-physical things).
To become damped or deadened.
To become damp or moist.
To make damp or moist; to make moderately wet.
To impart strength or vigor to.
To increase the nutritional value of food by adding ingredients.
To increase the defenses of; to strengthen and secure by military works; to render defensible against an attack by hostile forces.
To add spirits to wine to increase the alcohol content.