overactive
adjective/ˌəʊvərˈæktɪv/
/ˌəʊvərˈæktɪv/
[usually before noun]- (of an organ or part of the body) causing harm by doing something too much
- an overactive thyroid
- (of somebody’s imagination) too active, especially so that they imagine things that are not true
- She suffers from an overactive imagination.
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overactive