1. underuse - Noun
2. underuse - Verb
underuse (usually uncountable, plural underuses)
The act of using (something) less than expected.
underuse (third-person singular simple present underuses, present participle underusing, simple past and past participle underused)
to use (something) less than expected
Imagination is an infinite resource that cannot be diminished by overuse or underuse. Patch Adams