to dig up
Webster's Dictionary (GCIDE)
1.To turn up, or delve in, (earth) with a spade or a hoe; to open, loosen, or break up (the soil) with a spade, or other sharp instrument; to pierce, open, or loosen, as if with a spade. [1913 Webster]
Be first to dig the ground.— Dryden.[1913 Webster]
2.To get by digging; as, to dig potatoes, or gold. [1913 Webster]
3.To hollow out, as a well; to form, as a ditch, by removing earth; to excavate; as, to dig a ditch or a well. [1913 Webster]
4.To thrust; to poke. [Colloq.] [1913 Webster]
You should have seen children . . . dig and push their mothers under the sides, saying thus to them: Look, mother, how great a lubber doth yet wear pearls.— Robynson (More's Utopia).[1913 Webster]
5.To like; enjoy; admire. The whole class digs Pearl Jam. [Colloq.] [PJC]
To dig down, to undermine and cause to fall by digging; as, to dig down a wall.
To dig from, To dig out of, To dig out, To dig up, to get out or obtain by digging; as, to dig coal from or out of a mine; to dig out fossils; to dig up a tree. The preposition is often omitted; as, the men are digging coal, digging iron ore, digging potatoes.
To dig in, (a) to cover by digging; as, to dig in manure. (b) To entrench oneself so as to give stronger resistance; -- used of warfare or negotiating situations.
to dig in one's heels To offer stubborn resistance. [1913 Webster +PJC]