1. Indicating a lack of maturity
   "infantile behaviour"
   - childish 
2. Of or relating to infants or infancy
   "infantile paralysis" 
3. Being or befitting or characteristic of an infant
   "infantile games"

See also: immature, infancy, young

• bedrock
• bedroll
• bedroom
• bedroom community
• bedroom furniture
• bedroom set
• bedroom suite
• bedroomed
• bedside
• bedside manner
• bedside table
• bedsit
• bedsitter
• bedsitting room
• bedsore
• bedspread
• bedspring
• bedstead
• bedstraw
• bedtime
• Beduin
• bedwetter
• bee
• bee beetle
• bee eater