infrasonic /in-frə-sonˈik/ (acoustics)

1. (of frequencies) below the usual audible limit
2. Of, using or produced by infrasonic vibrations or pressure waves

• over-anxiety
• over-anxious
• over-anxiously
• overarch
• overarched
• overarches
• overarching
• overarm
• overate
• overawe
• overawed
• overawes
• overawing
• overbalance
• overbalanced
• overbalances
• overbalancing
• overbank
• overbear
• overbearing
• overbearingly
• overbearingness
• overbearingnesses
• overbears
• overbeat