Usage: 4 forms in 5 verses
Form Translated As     In Verse(s)
συκοφαντιών extortions LXX.Amos.2.8
συκοφαντίασ extortion LXX.Ps.119.134
extortions LXX.Eccl.4.1
συκοφαντίαν extortion LXX.Eccl.5.8
συκοφαντία extortion LXX.Eccl.7.7

Liddell-Scott-Jones

συκοφαντία (sukophantia) extortion G:N-F

συκοφαντία-ία, ,

vexatious or dishonest prosecution, chicane, barratry, blackmail, [Refs 5th c.BC+]; σ. τοῖς πράγμασι προσάγειν employ chicane in the case, [Refs 4th c.BC+]; τοῖς οἰκείοις σ. δέδωκεν has given them an opportunity for chicane, [Refs 2nd c.AD+]; contrasted with φήμη, [Refs 5th c.BC+]

__2 oppression, σ. πένητος [LXX]; extortion, [Refs 2nd c.BC+]; τὸ τακτὸν εἰς τὸ πρόστιμον τῆς σ. [Refs 3rd c.AD+]
__II quibble, sophism, [Refs 4th c.BC+]

LSJ Scripture Refs: LXX.Eccl.5.7*LXX.Ps.118.134*