The phrase "hath full plate" is often used to signify a person who has a lot on their plate or is very busy with various tasks. However, there are several antonyms for this phrase that can be used to describe someone who has less on their plate or is less busy. These antonyms include "free time," "unoccupied," "idle," "leisurely," "relaxed," "unhurried," "calm," "peaceful," "unburdened," "unencumbered," and "unrushed." Each of these antonyms describes a state of being that is opposite to having a full plate, indicating a person who has the time and space to pursue their interests or rest and relax.