IPA: //ˈspɛndiər//
KK: /ˈspɛndi/
More expensive than something else.
This restaurant is spendier than the one we visited last week.
Spendier → The word 'spendier' is derived from 'spend' (from Old French *despendre*, meaning to spend or to disburse) and the comparative suffix '-ier' (meaning more). Thus, 'spendier' means more inclined to spend or characterized by spending more than usual.
Think of someone who is 'more inclined to spend' — 'spend' relates to using money, and '-ier' indicates a comparison, making 'spendier' someone who spends more.