)fin
鳍, 鱼翅, 鳍状物, 五元纸币1. the cardinal number that is the sum of four and one
同义词：five, 5, V, cinque, quint, quintet, fivesome, quintuplet, pentad, Phoebe, Little Phoebe
2. one of a pair of decorations projecting above the rear fenders of an automobile
同义词：tail fin, tailfin
3. one of a set of parallel slats in a door or window to admit air and reject rain
同义词：louver, louvre
4. a shoe for swimming; the paddle-like front is an aid in swimming (especially underwater)
同义词：flipper
5. a stabilizer on a ship that resembles the fin of a fish
6. organ of locomotion and balance in fishes and some other aquatic animals
动词fin:
1. equip (a car) with fins
2. propel oneself through the water in a finning motion
3. show the fins above the water while swimming
同义词：break water
