adjective / verb / noun
level
LEV-ul/lˈɛvʌl/
Even and horizontal across a surface.
A spirit level shows that the shelf is perfectly level.

Etymology
Latin libella meant a small balance or level. English first used the word for a tool indicating a horizontal line, then for surfaces that are even or at the same height.
In context
lower the bucket until it is flat and level on the ground
More examples
- We need level ground for the picnic table.
- She levels the soil before laying the patio stones.
- He checks the countertop with a level.
Forms
level · levels · leveled · leveling · leveler · levelest
levelness noun — The state of being flat and horizontal.
Similar words
- flat
- Describes a surface without bumps, even if it slopes.
- horizontal
- Specifies a direction parallel to the horizon, not surface smoothness.
- even
- Emphasizes uniform height or smoothness rather than a horizontal position.