'lackluster' originates from the combination of 'lack' and 'luster', where 'lack' meant 'absence' and 'luster' meant 'shine or brightness'.

'lackluster' was formed in the late 16th century, combining 'lack' and 'luster' to describe something without brightness or vitality.

Initially, it meant 'without brightness or shine', but over time it evolved to describe anything lacking in vitality or inspiration.