Free-swinging means something that has unrestricted movement, is loose or unattached. The opposite of free-swinging would be something that is fixed, rigid or restrained. Antonyms for free-swinging could be confined, restrained, immobile or tethered. These terms suggest that something is held back, limited or unable to move freely. Additionally, antonyms for free-swinging could include words such as restricted, constrained, stagnant or controlled. These words imply that movement is either prohibited or limited by external factors. While free-swinging represents an element of freedom, the antonyms for it suggest a lack of independence, freedom or mobility.