erratic
Pronunciation:
/ɪˈɹætɪk/noun
Definitions
A rock moved from one location to another, usually by a glacier.
Anything that has erratic characteristics.
adjective
Definitions
Unsteady, random; prone to unexpected changes; not consistent
Example: Henry has been getting erratic scores on his tests: 40% last week, but 98% this week.
Deviating from normal opinions or actions; eccentric; odd.
Example: erratic conduct