inconstant /in-konˈstənt/

1. Subject to change, variable
2. Fickle

• federative
• Fed-Ex
• fedora
• fedoras
• Feds
• fed to the back teeth
• fed to the teeth
• fed up
• fee
• feeble
• feebled
• feeble-minded
• feeble-mindedly
• feeble-mindedness
• feebleness
• feeblenesses
• feebler
• feebles
• feeblest
• feebling
• feeblish
• feebly
• fee'd
• feed
• feedable