Lexical Definition

‎ἐκκακέω‎ ekkakéō (ek-kak-eh'-o) to lose heart ^G:V
from ‎ἐκ‎ and ‎κακός‎

faint, be weary.

• to be (bad or) weak, i.e. (by implication) to fail (in heart)

Liddell-Scott-Jones

ἐκκακέω,

to be faint-hearted, lose heart, grow weary, variant for{ἐγκ-}, [NT]

_{LSJ Scripture Refs: Luke.18.1 ☩ 2Cor.4.1}