high-pass filter 
(hīpăs)
(hīpăs)n.
A filter designed to transmit electromagnetic frequencies above a certain value, while excluding those of a lower frequency.
- unplugged
- unplumbed
- unpolished
- unpolitical
- unpopular
- unpopularity
- unpracticed
- unprecedented
- unprecedentedly
- unpredictability
- unpredictable
- unpredictably
- unprejudiced
- unpremeditated
- unprepared
- unpreparedly
- unpreparedness
- unprepossessing
- unpretending
- unpretentious
- unpretentiously
- unpretentiousness
- unpriced
- unprincipled
- unprintable