Too much focus on one's career may lead to one being uninteresting company. / Too much hard work and not enough leisure time can be unhealthy.

A fictional or generic location that is boring or dull. / A state or condition of boredom or disinterest.

A stupid person; a fool.

In a dull manner; without liveliness; without lustre.

plural of dullard

comparative form of dull: more dull

One who, or that which, dulls.

superlative form of dull: most dull

Somewhat dull; dull to a degree.

(rare) The behaviour or beliefs of a dullard; ignorance.