v. raise or support (the level of printing) by inserting a piece of paper or cardboard under the type
v. put (something) under or beneath
v. provide with a base, support, lining, or backing
vt. 把...置于另一物之下, 垫起, 从下面支撑
vi. (矿脉)倾斜
n. 放在下面的东西, 衬底, 支撑之物, 衬垫物
underlie的过去式