onomatopoeia

n [U] combination of sounds in a word that imitates or suggests what the word refers to eg hiss, cuckoo, thud 拟声; 象声词（如hiss、 cuckoo、 thud）.

one-night stand, one-off, one-sided, one-sidedly, one-sidedness, one-time, one-to-one, one-track mind, one-upmanship, one-way, onerous, oneself, ongoing, onion, online, onlooker, only, only that, only too, ono, onomatopoeic, onrush, onset, onshore, onside, onslaught, onto, onto (also on to), ontological, ontology, onus, onward, onward(s), onyx, oodles, oomph, ooze, op, op (also Op), op art,