Her·a·cli·tus 
(hĕr′ə-klītəs) fl. 500 BC.
(hĕr′ə-klītəs) fl. 500 BC. Early Greek philosopher who maintained that strife and change are the natural conditions of the universe.
Her′a·clite·an (-tē-ən) adj.
- Forth
- for that matter
- forthcoming
- for the best
- for the better
- for the birds
- for the hell of it
- for the life of
- for the life of (one)
- for the life of one
- for the love of
- for the most part
- for the present
- for the time being
- forthright
- forthrightly
- forthrightness
- forthwith
- fortieth
- fortifiable
- fortification
- fortified wine
- fortifier
- fortify
- fortifyingly