Smitch v.

Now dial. [f. SMITCH sb.¹] trans. To affect with smoke or smut.

1621.  G. Sandys, Ovid’s Met., V. (1626), 101. That soile … Now barren grew…. Now, too much drouth annoys; now, lodging showres: Stars smitch, winds blast.

1878.  E. W. L. Davies, Mem. J. Russell, 71. The country-people … left their milk-pans on the fire till the cream was ‘smitched’, or perhaps burned.