slade

Etymology 1

From Middle English slade (“low-lying ground, a valley; a flat grassy area, glade; hollows of clouds; a creek, stream; a channel”), from Old English slæd (“valley, glade”), from Proto-West Germanic *slad, from Proto-Germanic *sladą (“glen, valley”), of uncertain origin. Perhaps from Proto-Germanic *sladaną (“to glide, slip”) or Proto-Germanic *sladdaz (“to be slack, droop”). Compare Old Norse slóð (“track, trail”).

noun

1. (now rare or dialectal) A valley, a flat grassy area, a glade.
   The thick and well-growne fogge doth matt my smoother slades, And on the lower Leas, as on the higher Hades The daintie Clover growes (of grasse the onely silke) 1612, Michael Drayton, Poly-Olbion, song 13 p. 222
2. (dialectal) A hillside.

Etymology 2

Unknown.

noun

1. A spade for digging peat.
2. (obsolete) The sole of a plough.
   The Bishop, wearing a gleaming cape of green and gold, raised his hand over the plough and the kneeling farmers: "God speed the plough: the beam and the mouldboard, the slade and the sidecap, the share and the coulters[…]in fair weather and foul, in success and disappointment, in rain and wind, or in frost and sunshine. God speed the plough." 1945-01-29, “Pattern Prays”, in Time Magazine