সঠিক উত্তর হচ্ছে: quickened
ব্যাখ্যা:
Slackened : reduce or decrease in speed or intensity.
Recovered : return to a normal state of health, mind, or strength.
Multiplied : increase or cause to increase greatly in number or quantity.
Quickened : make or become faster or quicker.
Stopped : (of an event, action, or process) come to an end; cease to happen.
Antonym of
Slackened is
Quickened
