χαλεπόςchalepós
GreekG54672 occurrences (KJV)
difficult, i.e. dangerous, or (by implication) furious
KJV renders it: fierce, perilous
Where it appears
Lexical data: Strong’s Hebrew & Greek Dictionaries (1890, public domain; openscriptures, CC-BY-SA). Word tagging from the Strong’s-numbered KJV.