| FUGACIOUS | • fugacious adj. Fleeting, fading quickly, transient. • FUGACIOUS adj. lasting a short time, evanescent. |
| FUGUELIKE | • fuguelike adj. Resembling a fugue. • fuguelike adv. In the manner of a fugue. • FUGUELIKE adj. like a fugue. |
| FULGURITE | • fulgurite n. Glass formed by a lightning strike melting sand or other material. • FULGURITE n. a vitrified sand tube produced by the striking of lightning on sand. |
| FUSTILUGS | • fustilugs n. (UK, dialect, archaic, rare) An unattractive, grossly overweight person. • FUSTILUGS n. (obsolete) a fat and slovenly person. |
| OUTFIGURE | • outfigure v. (Transitive) To outthink. • OUTFIGURE v. to surpass in figuring. |
| SUBFEUING | • subfeuing v. Present participle of subfeu. • SUBFEU v. to grant land to under Scottish feudal law. |
| SUFFUSING | • suffusing v. Present participle of suffuse. • SUFFUSE v. to spread throughout. |
| SULFURING | • sulfuring v. Present participle of sulfur. • sulfuring n. Treatment with sulfur or sulfur compounds. • SULFUR v. to treat with sulfur, also SULPHUR. |
| UNCUFFING | • uncuffing v. Present participle of uncuff. • UNCUFF v. to remove handcuffs from. |
| UNFIGURED | • unfigured adj. Not figured; not marked with a pattern. • unfigured adj. Not figurative; literal. • UNFIGURED adj. not figured. |
| UNFURLING | • unfurling v. Present participle of unfurl. • unfurling n. The act by which something is unfurled. • UNFURL v. to unroll. |
| UNGAINFUL | • ungainful adj. Not gainful. • UNGAINFUL adj. not gainful. |
| UNGUIFORM | • unguiform adj. Claw-shaped. • UNGUIFORM adj. shaped like a claw. |
| UNTURFING | • unturfing v. Present participle of unturf. • UNTURF v. to strip of turf. |
| UPFURLING | • upfurling v. Present participle of upfurl. • UPFURL v. to roll up. |