the answer is steady
it is move for the opposite of steady
The opposite of steady is rickety.
Steady
wobbly
unchangeable, steady
The opposite of a prolonged activity is a brief one. Spending the summer in a place could have the opposite "a brief visit." The opposite of engaging in the same activity all summer would be doing many and varied things.
Steady or stabilize. Those words are the opposite of trembling.
Unfixed, unstable, unsteady, wobbly, weak...
The opposite of cancel (an appointment, an order) would be to confirm.The opposite of cancel (a subscription, a TV show) would be to renew.
To keep a steady weight, a person needs to do enough physical activity in a day to equal about 30 minutes of moderate activity. This should maintain their weight.
The opposite of expansion is contraction. For an activity where expansion is simply an increase, the opposite can be reduction.
The opposite of expansion is contraction. For an activity where expansion is simply an increase, the opposite can be reduction.