wigwag /wigˈwag/

1. To twist about
2. To signal by means of flags

1. The act of wigwagging
2. A level crossing signal that gives its indication, with or without a red light, by swinging about a fixed axis

Twisting

To and fro

• ground controller
• ground controllers
• ground controls
• ground cover
• ground covers
• ground crew
• ground crews
• ground-cuckoo
• ground-cuckoos
• ground-dove
• ground-doves
• grounded
• groundedly
• ground effect
• ground effects
• ground elder
• grounden
• grounder
• grounders
• ground-feeder
• ground-feeders
• ground floor
• ground floors
• ground frost
• ground game