adjective

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Bad / Dangerous

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flammable - Easily set on fire; capable of catching fire quickly.

Keep flammable materials away from open flames or heat sources.

noun

See verb

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Other / Light

flicker - An unsteady movement of a flame or light that causes rapid variations in brightness

Wade's TV signal was reduced to undecipherable flicker once his cable had been cut off.

verb

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Bad / Pain

flinch - To make a quick, nervous movement of the face or body as an instinctive reaction to surprise, fear or pain

Debbie was very brave and didn’t flinch when the nurse put the needle in her arm to give her the flu shot.

adjective

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Bad / Weak

flimsy - Comparatively light and insubstantial; easily damaged

With just a tiny bit of pressure applied, the smartphone was surprisingly flimsy.

adjective

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Good / Good

flawless - Perfect and without any imperfections

Bill was determined to buy the flawless diamond for his gem museum.

verb

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Other / Up+Down

flick - To hit or move something/ someone with a quick movement of the thumb and fore-finger.

James realised the safest way to remove the spider from Jennifer’s shoulder, was to flick it off.

verb

See noun

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Other / Light

flicker - (of light or a source of light) shine unsteadily; vary rapidly in brightness

The flickering candle did not provide enough light to see what was in the room.

verb

See noun

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Good / Smart

finesse - Do (something) in a subtle and delicate manner

After speaking with the customer like a friend, the salesman was able to finesse him into a sale.

noun

See verb

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Good / Smart

finesse - Intricate and refined delicacy

Roger Federer is a championship player because of his finesse on the tennis court.

verb

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Bad / Mistake

fizzle - To finish in a way that is disappointing

At the start of his race for mayor it looked like Fred was going to win, but his many verbal mistakes caused his candidacy to just fizzle out.

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.

verb

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Other / Move

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flow - To move steadily and continuously, typically in a liquid, air, or smooth motion.

The conversation flowed easily between the two old friends.