Abbott-Smith Manual Greek Lexicon
χαλεπός (G5467)
2 χαλεπός , -ή, -όν [in LXX: Is 18:2 ( נוֺרָא ), Wi 3:19 , Si 3:21 , al. ;] hard ; hard to do or deal with, difficult ; hard to bear, painful, grievous : καιροί , II Ti 3:1 ; of persons, hard to deal with, harsh, fierce, savage : Mt 8:28 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain