δύσδεικτος
From LSJ
ἄμμες δὲ γ' ἐσσόμεσθα πολλῷ κάρρονες → and we shall be better by far | we shall be sometime mightier men by far than both | sometime we shall become much better than you | so we shall be, and braver far
English (LSJ)
ον,
A hard to prove, θεωρήματα Gal. 15.139.