1. Carefree and happy and lighthearted
   "her lighthearted nature"
   - blithe, blithesome [archaic], lightsome, light-hearted

See also: cheerful, lightheartedness

• impenetrably
• impenitence
• impenitency
• impenitent
• impenitently
• imperative
• imperative form
• imperative mood
• imperatively
• imperativeness
• imperator
• imperatorial
• imperceptibility
• imperceptible
• imperceptibly
• imperceptive
• impercipient
• imperfect
• imperfect tense
• imperfectibility
• imperfectible
• imperfection
• imperfective
• imperfective aspect
• imperfectly