Abbott-Smith Manual Greek Lexicon
εὐ-περί-στατος (G2139)
1 * εὐ-περί-στατος , -ον ( εὖ , περιΐστημι ), of sins, readily besetting : He 12:1 (on form and sense of the word, v. Westc., in l.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain