Incompactness is the state or quality of being compact, dense, or tightly packed. Its antonyms include words such as openness, spaciousness, and looseness, which refer to qualities that are characterized by roominess, airiness, or a lack of constraint. Other antonyms for incompactness include words like diffusion, dispersion, and dissipation, which refer to the act or process of spreading out or scattering. Further antonyms include terms such as expansion, enlargement, and growth, which refer to processes or qualities that involve increasing in size, volume, or scope. Ultimately, incompactness stands in opposition to a range of qualities that suggest a sense of airy openness and a lack of constraint or confinement.