1. Guided by whim and fancy
   - flighty, flyaway, scatterbrained

See also: frivolous

• appoggiatura
• appoint
• appointed
• appointee
• appointive
• appointment
• appointment book
• appointment calendar
• apportion
• apportionable
• apportioned
• apportioning
• apportionment
• apposable
• appose
• apposite
• appositely
• appositeness
• apposition
• appositional
• appositive
• appositively
• appraisal
• appraise
• appraisee