infrasonic /in-frə-sonˈik/ (acoustics)

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

• shapelinesses
• shapely
• shapen
• shape one's course
• shaper
• shapers
• shapes
• shapeshifter
• shapeshifting
• shape up
• shape-up
• shape-ups
• shaping
• shapings
• shaps
• sharable
• sharawadgi
• sharawadgis
• sharawaggi
• sharawaggis
• shar'd
• shard
• shard beetle
• shard beetles
• shard-borne