1. Free from constraint
   "he was unconstrained by any of the sanctions of polite society"; "the dog was unconstrained"; "idle, unconstrained gossip"

See also: free

• hydrodynamics
• hydroelectric
• hydroelectric turbine
• hydroelectricity
• hydroflumethiazide
• hydrofluoric acid
• hydrofluorocarbon
• hydrofluosilicic acid
• hydrofoil
• hydrogel
• hydrogen
• hydrogen atom
• hydrogen azide
• hydrogen bond
• hydrogen bromide
• hydrogen carbonate
• hydrogen chloride
• hydrogen cyanide
• hydrogen fluoride
• hydrogen iodide
• hydrogen ion
• hydrogen ion concentration
• hydrogen peroxide
• hydrogen sulfide
• hydrogen sulphide