to substitute for someone temporarily
অস্থায়ীভাবে কারো পরিবর্তে দায়িত্ব নেওয়া
"The assistant will sit in for the teacher today."
"আজ শিক্ষক অনুপস্থিত থাকায় সহকারী তার জায়গায় ক্লাস নেবেন।"
to talk kindly or appreciatively about someone
to move something to one side; to separate from a group
to gradually relax and let go of anxious tension
to get rid of something by working or exercising
to suddenly start smiling
to communicate an idea effectively