aberration
a departure from what is normal or expected
Roots
- ab / abs: away, from, off, down, or apart
- err / errare: wander, stray, or go off course
Other words with the err / errare root
Ab- gives away and err gives wander. An aberration is the off-course event or result.
The strange result was an aberration, not the usual pattern.
Aberration is the noun cousin of aberrant. One data point, behavior, or event wanders away from the normal path.