The antonyms of the word "action" include inaction, passivity, lethargy, inertia, stillness, sluggishness, idleness, and indolence. Inaction refers to the lack of activity or movement, while passivity implies submission to external forces. Lethargy, sluggishness, and inertia denote a lack of energy or motivation to act. Stillness is a state of rest or absence of movement, and idleness suggests neglect or the absence of purposeful activity. Indolence means laziness or the reluctance to exert effort. All these antonyms point to the opposite of action and suggest a lack of energy, motion, or will to initiate or carry out a task or objective.