Meaning

adjective regulating or controlling expenditure or personal behavior

originFrom Latin sūmptuārius (“of or relating to expenditure, sumptuary; person in charge of household expenses”) + English -ary (suffix meaning ‘of or pertaining to’ forming adjectives). Sūmptuārius is derived from sūmptus (“charge, cost, expense”) + -ārius (suffix forming adjectives); and sūmptus from sūmō (“to catch, seize, take; to acquire, get, obtain; to apply, employ, use; to consume, spend”)…

Etymology from Wiktionary, CC BY-SA 3.0