underuse

un der use ▶verb |ˌəndərˈyo͞oz ˌəndərˈjuz | [ with obj. ] (usu. as adj. underused ) use (something ) below the optimum level: the owner noted a lot of underused space in that garage. ▶noun |ˌəndərˈyo͞os ʌndəˈjuːs |insufficient use: underuse of existing services.

underuse

under |use ▶verb |ʌndəˈjuːz | [ with obj. ] (usu. as adj. underused ) use (something ) below the optimum level: massive acreages of underused land. ▶noun |ʌndəˈjuːs | [ mass noun ] insufficient use: underuse of existing services.