Economic
late Middle English: via Old French and Latin from Greek oikonomikos, from oikonomia (see economy). Originally a noun, the word denoted household management or a person skilled in this, hence the early sense of the adjective (late 16th century) ‘relating to household management’. Modern senses date from the mid 19th century.
wiktionary
From Middle French economique, from Latin oeconomicus, from Ancient Greek οἰκονομικός(oikonomikós, “skilled with household management”).
etymonline
economic (adj.)
1590s, "pertaining to management of a household," perhaps shortened from economical, or else from French économique or directly from Latin oeconomicus "of domestic economy," from Greek oikonomikos "practiced in the management of a household or family" (also the name of a treatise by Xenophon on the duties of domestic life), hence, "frugal, thrifty," from oikonomia "household management" (see economy (n.)). Meaning "relating to the science of economics" is from 1835 and now is the main sense, economical retaining the older one of "characterized by thrift."
