χαλεπός, -ή, -όν [in LXX: Isa.18:2 (יָרֵא), Refs Wis.3:19, Sir.3:21, al. ;] hard; __(a) hard to do or deal with, difficult; __(b) hard to bear, painful, grievous: καιροί, 2Ti.3:1; __(with) of persons, hard to deal with, harsh, fierce, savage: Mat.8:28.† (AS)
1) hard to do, to take, to approach 2) hard to bear, troublesome, dangerous 2a) harsh, fierce, savage
Perhaps from G5465 through the idea of reducing the strength; difficult, that is, dangerous, or (by implication) furious
From the base of G5490; to lower (as into a void)
KJV Usage: let down, strike.
Probably from G5465; hail
KJV Usage: hail.
From G5465 a curb or headstall (as curbing the spirit)
KJV Usage: bit, bridle.
Perhaps from G5465 through the idea of hollowing out as a vessel (this metal being chiefly used for that purpose); copper (the substance, or some implement or coin made of it)
KJV Usage: brass, money.
Perhaps akin to the base of G5490 (G5465) or G5494 (as descending or empty); snow