The Collaborative International Dictionary of English v.0.48:

Harrow \Har"row\, v. t. [imp. & p. p. Harrowed
   (h[a^]r"r[-o]d); p. pr. & vb. n. Harrowing.] [OE. harowen,
   harwen; cf. Dan. harve. See Harrow, n.]
   1. To draw a harrow over, as for the purpose of breaking
      clods and leveling the surface, or for covering seed; as,
      to harrow land.
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            Will he harrow the valleys after thee? --Job xxxix.
                                                  10.
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   2. To break or tear, as with a harrow; to wound; to lacerate;
      to torment or distress; to vex.
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            My aged muscles harrowed up with whips. --Rowe.
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            I could a tale unfold, whose lightest word
            Would harrow up thy soul.             --Shak.
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The Collaborative International Dictionary of English v.0.48:

Harrow \Har"row\ (h[a^]r"r[-o]), n. [OE. harowe, harwe, AS.
   hearge; cf. D. hark rake, G. harke, Icel. herfi harrow, Dan.
   harve, Sw. harf. [root]16.]
   1. An implement of agriculture, usually formed of pieces of
      timber or metal crossing each other, and set with iron or
      wooden teeth. It is drawn over plowed land to level it and
      break the clods, to stir the soil and make it fine, or to
      cover seed when sown.
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   2. (Mil.) An obstacle formed by turning an ordinary harrow
      upside down, the frame being buried.
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   Bush harrow, a kind of light harrow made of bushes, for
      harrowing grass lands and covering seeds, or to finish the
      work of a toothed harrow.

   Drill harrow. See under 6th Drill.

   Under the harrow, subjected to actual torture with a
      toothed instrument, or to great affliction or oppression.
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The Collaborative International Dictionary of English v.0.48:

Harrow \Har"row\, interj. [OF. harau, haro; fr. OHG. hara, hera,
   herot, or fr. OS. herod hither, akin to E. here.]
   Help! Halloo! An exclamation of distress; a call for succor;
   -- the ancient Norman hue and cry. "Harrow and well away!"
   --Spenser.
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         Harrow! alas! here lies my fellow slain. --Chaucer.
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The Collaborative International Dictionary of English v.0.48:

Harrow \Har"row\, v. t. [See Harry.]
   To pillage; to harry; to oppress. [Obs.] --Spenser.
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         Meaning thereby to harrow his people.    --Bacon
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WordNet (r) 3.0 (2006):

harrow
    n 1: a cultivator that pulverizes or smooths the soil
    v 1: draw a harrow over (land) [syn: harrow, disk]

Moby Thesaurus II by Grady Ward, 1.0:

126 Moby Thesaurus words for "harrow":
   afflict, agonize, ail, backset, badger, bait, bedevil, bite,
   bloody, burn, chafe, claw, cog, comb, convulse, crag, crucify,
   cultivate, culture, cut, dab, delve, devil, dig, distress, drag,
   dress, dub, equalize, even, excruciate, fallow, fang, fertilize,
   fester, flatten, force, fret, gall, give pain, gnaw, grade, grate,
   grease, grind, gripe, heckle, hector, hoe, hurt, impale, inflame,
   inflict pain, irritate, jag, kill by inches, lacerate, lancinate,
   lay, level, list, lubricate, macerate, martyr, martyrize, mow,
   mulch, needle, nip, oil, pain, peak, pecten, pester, pierce, pinch,
   plane, planish, plaster, plow, prick, projection,
   prolong the agony, prune, punish, put to torture, rack, rake,
   rankle, rasp, ratchet, rip, rub, savage, sawtooth, scarify, shave,
   smooth, smooth down, smooth out, snag, snaggle, spade, spire,
   sprocket, spur, stab, steeple, sting, tantalize, tease, thin,
   thin out, till, till the soil, tooth, torment, torture, try, tweak,
   twist, weed, weed out, work, wound, wring



Easton's 1897 Bible Dictionary:

Harrow
   (Heb. harits), a tribulum or sharp threshing sledge; a frame
   armed on the under side with rollers or sharp spikes (2 Sam.
   12:31; 1 Chr. 20:3).

     Heb. verb _sadad_, to harrow a field, break its clods (Job
   39:10; Isa. 28:4; Hos. 10: 11). Its form is unknown. It may have
   resembled the instrument still in use in Egypt.