auk

n northern sea-bird with short narrow wings 海雀（北方海鸟, 翅短而窄）.

audio, audio frequency, audio typist, audio-, audio-visual, audit, audition, auditor, auditorium, auditory, Aug, auger, aught, augment, augmentation, augmented, augur, augury, August, Augustan, auld lang syne, aunt, Aunt Sally, auntie (also aunty), aura, aural, aurally, aureola, auricular, aurora, auspice, auspices, auspicious, Aussie, austere, austerely, austerity, Australia, Australian, Australian Rules,