Revelation 16:21 And there fell upon men a great hail out of heaven, [every stone] about the weight of a talent: and men blasphemed God because of the plague of the hail; for the plague thereof was exceeding great.
5464 chalaza {khal'-ad-zah}
probably from 5465;; n f
AV - hail 4; 4
1) hail
from 5465...
5465 chalao {khal-ah'-o}
from the base of 5490;; v
AV - let down 6, strike 1; 7
1) to loosen, slacken, relax
2) to let down from a higher place to a lower
from the base of 5490...
5490 chasma {khas'-mah}
from a form of an obsolete prim chao (to "gape" or "yawn");; n n
AV - gulf 1; 1
1) a gaping opening, a chasm, a gulf
Cf.
What's a Chelyaba anyway?
It's a Bashkir word meaning "pit".
http://chelyabinskteaching.blogspot.com/2011/09/whats-chelyaba-anyway.html
Now THAT is interesting.