From spill + -th.
- archaic A spillage; spilled material.
#:*1950, Like a vast spider suspended by a metal chord, a candelabrum presided over the room nine feet above the floor-boards. From its sweeping arms of iron, long stalactites of wax lowered their pale spilths drip by drip, drip by drip. â€” Mervyn Peake, Titus Groan
#:*1985, Baked fish lay cooling on the table, and there was a great spilth of wine on the floor. â€” Anthony Burgess, Kingdom of the Wicked