en·rich 
(ĕn-rĭch)
(ĕn-rĭch)tr.v. en·riched, en·rich·ing, en·rich·es
1. To make rich or richer.
2. To make fuller, more meaningful, or more rewarding: An appreciation of art will enrich your life.
3. To add fertilizer to.
4. To add a nutrient or nutrients to: a government program to enrich flour with folic acid.
5. To add to the beauty or character of; adorn: "Glittering tears enriched her eyes" (Arnold Bennett).
6. Physics To increase the amount of one or more radioactive isotopes in (a material, especially a nuclear fuel).
[Middle English enrichen, from Old French enrichier : en-, causative pref.; see EN-1 + riche, rich; see RICH.]
en·richer n.