minimise

verb5

1. •
   To make (something) smaller or as small as possible; shrink; reduce.

   • We have to minimize the budget.
   • Try to minimize your biases.
2. •
   To relegate or assign (something) to a less insignificant status; diminish.

   • The insurance adjuster tried to minimize the extent of the damage to lessen the company's exposure to liability.
3. •
   To treat (someone) in a slighting manner.

   • […] father who had never openly minimized him or anything he did […] — 1993
4. •
   To treat as trivial or insignificant; to trivialize.
5. •
   To remove (a window) from the main display area, collapsing it to an icon or caption.

   • I didn't close anything, but I minimized all the windows so I could see the desktop.