From a presumed compound of epi and boulomai; a plan against someone, i.e. A plot -- laying (lying) in wait.
see GREEK epi
see GREEK boulomai
ἐπιβουλαῖς (epiboulais) − 1 Occurrence
ἐπιβουλὴ (epiboulē) − 1 Occurrence
ἐπιβουλῆς (epiboulēs) − 2 Occurrences