Bad
fade - To gradually lose brightness, color, or strength.
fangs - Long, pointed teeth used by animals especially snakes, spiders, or carnivores to bite and sometimes inject venom.
flaccid - Lacking strength, firmness, or resilience.
fairytale - A children's story about magical and imaginary beings and lands; or something that is too good to be true or seems unreal.
flammable - Easily set on fire; capable of catching fire quickly.
firestorm - A violent outburst or uproar of emotion, controversy, or public reaction.
flaky - Unreliable or inconsistent in behavior, especially in keeping commitments.
fawning - Acting overly eager to please someone, especially someone in power.
flareup - A sudden outburst or intensification of something, especially violence or emotion.
feverishly - In a highly excited or frantic manner, often due to intense emotion or urgency.
fray - To wear out or unravel the edges of fabric or material through constant rubbing or use.
forbid - To strongly oppose or reject something morally or culturally.