The word "tightenings" refers to actions or processes that make something tighter, more constricted, or less easy to move. Antonyms for "tightenings" might include words like "loosenings," "relaxings," "expansions," or "easings." These words imply actions or processes that make something less constrained, more flexible, or easier to move. For example, "loosenings" might refer to relaxing a tense muscle or loosening a tight knot. "Relaxings" might refer to unwinding after a stressful day or chilling out after a busy week. "Expansions" might refer to opening up a space or stretching out a tight fabric. "Easings" might refer to reducing tension or making something more comfortable.