The antonyms for the phrase "full swings" could be "slow-paced," "sluggish," or "incomplete." "Slow-paced" suggests that there is a lack of energy or movement, whereas "full swings" imply a high level of momentum and intensity. "Sluggish" similarly connotes a lack of speed and activity, suggesting a slowness or unwillingness to move forward. Finally, "incomplete" implies that something is missing, suggesting that the force or energy present in "full swings" is lacking or absent altogether. Ultimately, the antonyms for "full swings" suggest a lack of movement, speed, energy or power, highlighting the stark contrast between them.