Dungeon World Companion

Bolster

Special move

Trigger
When you spend your leisure time in study, meditation, or hard practice
Roll
Not rolled

Full text

When you spend your leisure time in study, meditation, or hard practice, you gain preparation. If you prepare for a week or two, 1 preparation. If you prepare for a month or longer, 3 preparation. When your preparation pays off spend 1 preparation for +1 to any roll. You can only spend one preparation per roll.

Read it in the rules: Bolster