The least one can do

noun

1. The least quantity assignable, admissible, or possible

   "Keep expenses to a bare minimum."

2. The least of a set of numbers
3. The lowest degree or amount of variation (as of temperature) reached or recorded
4. The lowest speed allowed on a highway

noun

1. Living wage
2. The lowest wage paid or permitted to be paid

noun

1. A prison in which prisoners are allowed more freedom than in most other prisons because they are not considered dangerous or likely to escape

noun

1. A U.S. federal income tax that was originally imposed to prevent wealthy taxpayers from using tax shelters to avoid paying taxes, that excludes many deductions and exemptions allowed in computing regular tax liability, and that must be paid instead of the regular tax liability by individuals and businesses whose alternative minimum tax liability is greater than their regular tax liability

idiom

1. At least

   "We'll need 10 years at a/the minimum."

idiom

1. As low as possible

   "We need to keep expenses to a (bare) minimum."

adjective

1. Having or providing less than a specified minimum

   "The ore shipment was rejected for subminimum uranium content …"