Erratic and unpredictable in behavior or direction.
- ‘Nowadays, there is vigorous and vagarious competition in the software market.’
- ‘The generalization capability of the self-organizing network can cope with vagarious operating conditions which have not been encountered during the training phase and hence a give correct classification result.’
- ‘The emotional goal was to eliminate vagarious, capricious, out-of-touch control by the powerful past presidents.’
- ‘The least vagarious tendency of the mind in the leaders of men, especially in those holding seats of power, is fraught with the gravest danger.’
- ‘It's a very vagarious server and sometimes returns a session timeout error, but most of the times you will download the files just fine.’
Late 18th century (in the sense changing, inconstant): from vagary + -ous.