To enhance.
To add nutrients or fertilizer to the soil; to fertilize.
To increase the amount of one isotope in a mixture of isotopes, especially in a nuclear fuel.
To adorn, ornate more richly.
To make (someone or something) rich or richer.
To add nutrients to foodstuffs; to fortify.
To make to rise the proportion of a given constituent.
To embellish or improve something unnecessarily.
To add superfluous attributes to something.