When you bury something again, you rebury it. If a pirate decides that his hiding place for a treasure chest isn't secret enough, he might dig it up and rebury it in a more secluded spot.
To bury something is to dig a hole, put the object in it, and cover it up with dirt. When you rebury something, you simply do this a subsequent time: "My dog likes to bury her bone in the yard, dig it up, and rebury it in the exact same place." The "again" prefix re- is added to bury, from an Old English root, byrgan2020欧洲杯时间, "to hide or bury."