soft shoulder

(also verge) soft edge at the side of a road that is not suitable for vehicles to drive on （不适宜车辆行驶的）软质路肩.

soda siphon, soda-fountain, soda-water, sodden, sodding, sodium, sodium carbonate (also `washing soda), sodium chloride, sodium hydroxide (also ,caustic `soda), sodomite, sodomy, sofa, soft, soft currency, soft drug, soft fruit, soft landing, soft option, soft palate, soft porn, soft soap, soft-boiled, soft-drink, soft-hearted, soft-heartedness, soft-pedal, soft-soap, soft-spoken, softball, soften, softener, softish, softly, softness, software, softwood, softy (also softie), soggily, sogginess, soggy,