G1967 ἐπιούσιος (epioúsios)

KJV renderings: daily
Strong's definition: tomorrow's; but more probably from G1909 (ἐπί) and a derivative of the present participle feminine of G1510 (εἰμί); for subsistence, i.e. needful
Derivation: perhaps from the same as G1966 (ἐπιοῦσα);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.