the person in charge of an organization or unit; first in command; top leader

teaching or guiding someone very carefully and personally, often by demonstrating every step in detail

The second-highest ranking official in a unit or department; a deputy leader.

The person in overall charge; the number one in command of an organization or leadership group

door handle or knob used for opening and closing a door

(colloquial) to help out; to assist with a physical task

to lend a hand; to assist or help out

The person whose authority is second only to the leader, such as a deputy or co-chairperson