The quality or state of not wanting to work or be active; unwillingness to make effort.
From Middle English 'lazy' (of unknown origin, possibly from Dutch or Low German), plus '-ness' (state or quality). The word emerged in the 15th century.
What we call 'laziness' might actually be your body's way of conserving energy for important survival tasks—animals that preserve energy survive better, so a little laziness might be evolutionarily smart.
Complete word intelligence in one call. Free tier — 50 lookups/day.