Underused

The canteen is underused, but always dirty and neglected.

Semicolons are underused.

Gotta say, a water pitcher is an underrated and underused option these days.

This is reflected in the sterling work of community rail, mobilising volunteers and stakeholders to revitalise underused station buildings and engage with their local community.

Underused neuronal pathways are pruned back, as are underused patches of mycelium.