The word "up-sprang" suggests movement and action, but what are its antonyms? To answer that, we need to first understand its meaning. "Up-sprang" is a past tense verb that means to jump up or rise suddenly. Its antonyms are words that describe a lack of movement or stagnation, such as "fall," "sink," "descend," "dip," or "drop." These words suggest a downward or static motion, the complete opposite of "up-sprang." While "up-sprang" may imply enthusiasm and vitality, its antonyms suggest a lack of energy and dynamism. The context in which we use these words will vary depending on the desired effect.