gudgeon

n small freshwater fish used as bait 　（小型淡水鱼, 可作钓饵）.

Guam, guano, guarantee, guarantee against, guarantor, guaranty, guard, guard against, guard's van, guard-rail, guarded, guardhouse, guardian, guardian angel, guardianship, guardroom, guardsman, Guatemala, guava, gubernatorial, guelder rose, guerrilla, guerrilla (also guerilla), guess, guesser, guesstimate, guesswork, guest, guest-house, guest-night, guest-room, guesthouse, guestroom, guffaw, guidance, guide, guide-dog, guide-line, guided, guideline,