IPA: /ˈrɪtʃər/
KK: /ˈrɪtʃər/
Having more wealth or resources than someone else or compared to a previous state.
After the successful business deal, he felt much richer than before.
Richer → It is formed from "rich" (from Old English "rice", meaning powerful or wealthy) and "-er" (meaning a person who or more). The word "richer" means more wealthy or possessing greater wealth than another.
Think of someone who is 'more wealthy' — 'rich' refers to wealth, and '-er' indicates a comparison, so richer means having more wealth.