Strong's G5467 — χαλεπός (adjective)
chalepos (khal-ep-os') adj.
1. difficult, i.e. dangerous
2. (by implication) furious
[perhaps from G5465 through the idea of reducing the strength]
KJV: fierce, perilous 
Root(s): G5465 
Hebrew root: χαλάω
Occurrences: 2