onomatopoeia · the sound of a door, floorboard, or bed made when pressure is applied or when moving

老旧的木门嘎吱一声开了。

onomatopoeia · the sound made when stepping on something crisp or brittle, such as snow, gravel, or dry leaves

他走在厚厚的积雪上，脚下发出嘎吱嘎吱的响声。