English Words Starting With F

• fuckhead

  nounLow (vulgar slang)
  /ˈfʌk.hɛd/A term of abuse for someone considered stupid, annoying, or contemptible.
• fuckoff

  nounMedium-High (within informal/vulgar contexts)
  /ˌfʌk ˈɒf/An extremely rude and forceful command for someone to leave or go away; to depart in anger.
• fuckup

  nounHigh (in colloquial/informal contexts)
  /ˈfʌk.ʌp/A serious, stupid, or embarrassing mistake or failure.
• fuckwit

  nounLow
  /ˈfʌkwɪt/A stupid, incompetent, or contemptible person; an idiot.
• fucoid

  adjectivenounC2
  /ˈfjuːkɔɪd/Relating to or resembling seaweed, particularly of the order Fucales (like bladderwrack).
• fucoxanthin

  nounC2 / Highly Specialized
  /ˌfjuːkə(ʊ)ˈzanθɪn/A brown carotenoid pigment found in brown algae (such as kelp and wakame) and certain other photosynthetic organisms like diatoms, which plays a crucial role in light absorption for photosynthesis.
• fucus

  nounC2
  /ˈfjuːkəs/Any of various brown seaweeds (algae), often found in rocky intertidal zones, typically with leathery or rubbery fronds.
• fud

  nounLow
  /fʌd/A Scottish term for buttocks; a backside.
• fudd

  nounRare
  /fʌd/A short-lived or trivial state of confusion, disarray, or mild mental fog.
• fuddle

  nounverbverb-intransitiveverb-transitiveLow
  /ˈfʌd(ə)l/To confuse or stupefy, especially with alcohol; to make drunk.
• fuddle-duddle

  verb-intransitiveVery Low
  /ˈfʌd.əl ˈdʌd.əl/A euphemistic, sometimes humorous exclamation or mild oath expressing annoyance, dismissal, or confusion, often used as a substitute for a stronger profanity.
• fuddling cup

  nounVery Rare / Obsolete
  /ˈfʌd.lɪŋ ˌkʌp/A historic drinking vessel, typically a puzzle cup designed with multiple interconnected chambers, intended to confuse or challenge the drinker, often leading to spillage or requiring skill to drain.
• fuddy-duddy

  adjectivenounLow-Mid
  /ˌfʌd.i ˈdʌd.i/A person who is old-fashioned, conservative, resistant to change and overly concerned with tradition or propriety.
• fudge

  nounverbB2
  /fʌdʒ/A soft, rich, sweet confection made from sugar, butter, and milk.
• fudge factor

  nounC1-C2
  /ˈfʌdʒ ˌfæk.tər/A deliberately introduced margin of error or amount of adjustment in calculations, data, or measurements to account for uncertainty or to achieve a desired result.
• fuegian

  adjectivenounC2
  /fjuːˈeɪ.dʒi.ən/Relating to the Tierra del Fuego archipelago at the southern tip of South America, or its indigenous peoples.
• fuel

  nounverbverb-intransitiveverb-transitiveB2
  /ˈfjuːəl/A substance that is burned to provide heat or power, such as coal, gas, or oil.
• fuel air bomb

  nounLow (specialist/technical)
  /ˌfjuːəl ˈeə bɒm/A large explosive weapon that disperses a cloud of flammable fuel which mixes with atmospheric oxygen before being ignited, creating a massive blast wave and pressure effect.
• fuel cell

  nounC1
  /ˈfjuːəl ˌsel/A device that generates electricity by a chemical reaction, typically combining hydrogen and oxygen, without combustion.
• fuel element

  nounC2
  /ˈfjuːəl ˈɛlɪmənt/A single, discrete unit containing nuclear fuel, designed for insertion into a nuclear reactor core.

Showing 5461–5480 of 5868 words.