1. Not subjected to discipline
   "undisciplined talent" 
2. Not subjected to correction or discipline
   - uncorrected 
3. Lacking in discipline or control
   "undisciplined behaviour"
   - ungoverned

See also: uncontrolled, unpunished, untrained

• fountain
• fountain grass
• Fountain of Youth
• fountain pen
• fountainhead
• Fouquieria
• Fouquieria columnaris
• Fouquieria splendens
• Fouquieriaceae
• four
• four flush
• Four Horsemen
• Four Hundred
• four o'clock
• four times
• four-card monte
• four-centered arch
• four-dimensional
• four-eyes
• four-flusher
• four-footed
• four-footed butterfly
• four-four time
• four-hitter
• four-hundredth