1.
rich, abundant, plentiful
Having a great deal of something; wealthy or plentiful in resources.
This country is rich in resources, producing a lot of oil and natural gas.
2.
rich, full (in quality)
Having depth, richness, or fullness in terms of experience, emotion, or expression.
People with expressive faces are attractive.
表情が豊か = expressive, rich in facial expressions
Related Words
Antonym:
乏しい (scarce, lacking)