I.up [美 əp, 英 ʌp]副up often appears as the second element of certain verb structures in English (back up, pick up, sit up, etc). For translations, see the relevant verb entry (back, pick, sit, etc).
This works well up to some accuracy and some range for the input values, but some interesting phenomena such as chaos and singularities are hidden by linearization.
The windmill pumped water from the well up into the tank at the top of the tankhouse, from where it flowed down under gravity pressure to the house and garden.