enrich

To enhance.

To make (someone or something) rich or richer.

To adorn, ornate more richly.

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 add nutrients to foodstuffs; to fortify

To make to rise the proportion of a given constituent.

To add new elements, to complete.