adjective

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Bad / Uncomfortable

finicky - Fussy about one's needs or requirements, liking things only when they are correct in every detail

Laura was so skinny because she was a very finicky eater, only liking foods prepared in a very specific way.

noun

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Bad / War

Url

flareup - A sudden outburst or intensification of something, especially violence or emotion.

There was a flareup of violence during the protest.

verb

See noun

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Bad / Dishonest

fink - Inform on to the authorities

Mary finked on her brother when their parents asked which one of them took a cookie out of the jar.

verb

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Other / Move

Url

fluctuate - To change or vary irregularly, especially in amount or level.

Gas prices tend to fluctuate depending on supply and demand.

verb

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Other / Move

flit - To move swiftly and lightly

The hummingbird's wings flitted so quickly that they became a blur.

adjective

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Bad / Unfriendly

flippant - Not showing a serious or respectful attitude

Quincy's flippant attitude towards his coworkers and supervisors made him the most likely person to be fired next.

adjective

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Other / Surprise

flabbergasted - To be surprised, amazed, or shocked very unexpectedly

Lucille was flabbergasted when she arrived at her classroom Tuesday morning for another day of teaching, and her 4th grade students had made a surprise birthday party for her.

noun

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Other / Light

Url

flame - A hot, glowing body of ignited gas produced by something on fire; or a strong feeling, especially of passion, anger, or love.

The candle’s flame flickered gently in the dark room.

noun

See verb

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Bad / Dishonest

fink - An unpleasant or contemptible person

Randall was the fink of the office who everyone tried to avoid.

verb

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Other / Move

flail - To swing back and forth very quickly.

Many businesses will feature an inflatable mascot that flails wildly in the wind.

noun

See verb

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Other / Entice

flirt - A person who habitually flirts

Saul was a natural flirt, always attracting the attention of girls.

noun

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Other / Fast

Url

flashback - A sudden, vivid memory of a past event, often triggered by something in the present. Often used in films and books.

In the movie, there was a flashback showing the hero’s troubled past.