Source : Webster's Revised Unabridged Dictionary (1913)

Sweat \Sweat\, v. i. [imp. & p. p. {Sweat} or {Sweated} (Obs.
   {Swat}); p. pr. & vb. n. {Sweating}.] [OE. sweten, AS.
   sw[ae]tan, fr. sw[=a]t, n., sweat; akin to OFries. & OS.
   sw[=e]t, D. zweet, OHG. sweiz, G. schweiss, Icel. sviti,
   sveiti, Sw. svett, Dan. sved, L. sudor sweat, sudare to
   sweat, Gr. ?, ?, sweat, ? to sweat, Skr. sv[=e]da sweat, svid
   to sweat. [root]178. Cf. {Exude}, {Sudary}, {Sudorific}.]
   1. To excrete sensible moisture from the pores of the skin;
      to perspire. --Shak.

   2. Fig.: To perspire in toil; to work hard; to drudge.

            He 'd have the poets sweat.           --Waller.

   3. To emit moisture, as green plants in a heap.

Swat \Swat\ (sw[o^]t), obs.
   imp. of {Sweat}. --Chaucer.

Source : WordNet®

swat
     n : a sharp blow
     [also: {swatting}, {swatted}]

swat
     v : hit swiftly with a violent blow; "Swat flies"
     [also: {swatting}, {swatted}]