1. Moving very rapidly to and fro or up and down

See also: moving, vibrate

• folderol
• folding
• folding chair
• folding door
• folding money
• folding saw
• foldout
• Foley
• foliaceous
• foliage
• foliaged
• foliar
• foliate
• foliated
• foliation
• folic acid
• folie
• folie a deux
• folio
• foliolate
• foliose
• folium
• folk
• folk art
• folk ballad