The Collaborative International Dictionary of English v.0.48:

Stink \Stink\, v. i. [imp. & p. p. Stunk, Stank, p. pr. &
   vb. n. Stinking.] [AS. stinkan to have a smell (whether
   good or bad); akin to OHG. stinchan, G. & D. stinken to
   stink; of uncertain origin; cf. Icel. st["o]kkva to leap, to
   spring, Goth. stigqan to push, strike, or Gr. ? rancid. Cf.
   Stench.]
   To emit a strong, offensive smell; to send out a disgusting
   odor.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stunk \Stunk\,
   imp. & p. p. of Stink.
   [1913 Webster]