Lexical Definition

‎διαπραγματεύομαι‎ diapragmateúomai (dee-ap-rag-mat-yoo'-om-ahee) to gain in trade ^G:V
from ‎διά‎ and ‎πραγματεύομαι‎

gain by trading.

• to thoroughly occupy oneself, i.e. (transitively and by implication) to earn in business

Abbott-Smith

* δια-πραγματεύομαι , “perfective compound” (v. M, Pr., 118);
1. to examine thoroughly (Plat.).
2. In late writers (Dion. Hal.), to gain by trading: Lk 19:15.†

Abbott-Smith References

Liddell-Scott-Jones

διαπραγματεύομαι,

discuss or examine thoroughly, τοῦτον τὸν λόγον [Refs 5th c.BC+]

__II gain by trading, [NT]
__III accomplish, τι πρὸς τοὺς θεούς [Refs 4th c.AD+]

_{LSJ Scripture Refs: Luke.19.15}