fickle /fikˈl/

1. Inconstant in affections, loyalties or intentions
2. Changeable

To perplex or puzzle

fickˈleness noun

• flatliner
• flatliners
• flatlines
• flatling
• flatlings
• flatlining
• flatlong
• flatly
• flatmate
• flatmates
• flatness
• flatnesses
• flat out
• flatpack
• flatpacks
• flat-panel
• flat playing field
• flat race
• flat races
• flat racing
• flat rate
• flat rates
• flats
• flat-screen
• flatshare