Strong's Greek #2940 - κυβεία, ας, ἡ kubeia (dice playing)

sleight, trickery

From kubos (a "cube", i.e. Die for playing); gambling, i.e. (figuratively) artifice or fraud -- sleight.

Strong's 2940: κυβείᾳ

κυβείᾳ (κυβία T WH; see Iota), κυβειας, ἡ (from κυβεύω, and this from κύβος a cube, a die), dice-playing (Xenophon, Plato, Aristotle, others); tropically, ἡ κυβείᾳ τῶν ἀνθρώπων, the deception (A. V. sleight) of men, Ephesians 4:14, because dice-players sometimes cheated and defrauded their fellow-players.

Strong's Greek: 2940. κυβεία (kubeia) — 1 Occurrence

Ephesians 4:14 - N-DFS
GRK: ἐν τῇ κυβείᾳ τῶν ἀνθρώπων
NAS: of doctrine, by the trickery of men,
KJV: by the sleight of men,
INT: in the sleight the of men