Abbott-Smith Manual Greek Lexicon
παχύνω (G3975)
2 παχύνω ( παχύς , thick ), [in LXX: De 32:15 , Is 6:10 ( שָׁמֵן ), al.;] to thicken , fatten ; pass., to grow fat . Metaph., to make dull or stupid ( τ. ψυχάς , Plut.); pass., to wax gross : ἡ καρδία , Mt 13:15 , Ac 28:27 (LXX).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain