Hiking up means to climb or ascend, but what about its opposite? The antonyms for hiking up could be descending or descending down. If someone is hiking up a hill, they are moving from a lower elevation to a higher one. To descend or descend down would be to move from a higher elevation to a lower one. Other antonyms for hiking up could include going down, de-escalating, or lowering. These words are useful in describing movement or progress in a downward direction. In conclusion, antonyms for hiking up can be used to describe the opposite action of moving upwards, such as descending or lowering.