Used mainly in 赡养 (to support, provide for). It specifically means a younger person financially supporting elders or dependents — a legal duty in Chinese family law. Compare 抚养, which is raising children downward.
Left 贝 (cowrie shell, ancient money), the indexing radical. It marks 赡 as money-related — providing financial support — alongside 财 (wealth) and 贷 (to lend).