Strong's Concordance
epistérizó: to make stronger
Original Word: ἐπιστηρίζωPart of Speech: Verb
Transliteration: epistérizó
Phonetic Spelling: (ep-ee-stay-rid'-zo)
Short Definition: I prop up, uphold, confirm
Definition: I prop up, uphold, support, confirm, make stronger.
HELPS Word-studies
1991 epistērízō (from 1909 /epí, "suitably on, fitting" and 4741 /stērízō, "make firm") – properly, "prop up, uphold, support, confirm" (Souter), i.e. support (establish) in an apt, fitting way; to confirm as it builds on the Lord's previous work of faith (note the force of the prefix epi, "upon"). This process strengthens by extending the understanding that precedes, as it supports what must follow.
Thayer's Greek Lexicon
STRONGS NT 1991: ἐπιστηρίζωἐπιστηρίζω; 1 aorist
ἐπεστηριξα; a later word;
to establish besides, strengthen more; to render more firm, confirm:
τινα, one's Christian faith,
Acts 14:22;
Acts 15:32, 41;
Acts 18:23 R G.