单词 nast 释义 ▪ I. nast dial.|nst, --|[Back-formation from nasty a.]Dirt, filth, foulness.1789Marshall Rural Econ. Glouc. I. 330 Nast, foulness; weeds in a fallow.1839Hereford Gloss., Nast, dirt, nastiness.1882–in dial. glossaries (Lanc., Chesh., Warw...