to be working or responsible for something at a certain time
নির্দিষ্ট সময়ে দায়িত্বে থাকা বা কাজ করা
"The guard was on duty all night."
"প্রহরী সারারাত দায়িত্বে ছিল।"
at the peak of activity or progress
to deal with a difficult technological challenge
to persuade someone to join an activity
to gain control by causing disagreement among others
to find something or someone after a search
to take on a task that is too difficult