thilk

from The Collaborative International Dictionary of English v.0.48

Thilk \Thilk\, pron. [Cf. {Ilk} same.]
   That same; this; that. [Obs.] "I love thilk lass." --Spenser.
   [1913 Webster]

         Thou spake right now of thilke traitor death.
                                                  --Chaucer.
   [1913 Webster]