Strong's #7702: sadad (pronounced saw-dad')
 a primitive root; to abrade, i.e. harrow a field:--break clods, harrow.
Brown-Driver-Briggs Hebrew Lexicon:
 ׂ 
  śâdad 
 
 1) (Piel) to harrow
 
  Part of Speech: verb
Relation: a primitive root
Usage:
This word is used 3 times:
Job 39:10: "with his band in the furrow? or  will he harrow the valleys after"
Isaiah 28:24: "day to sow? doth he open  and break the clods of his ground?"
Hosea 10:11: "Judah shall plow, and Jacob  shall break his clods."