Most of us do not deliberately try to intimidate others.
Keep your distance and don't invade other people's personal space.
They include annoying or not getting along with other employees, failing to pay debts to other employees or failing to cooperate with coworkers in performing the work.
It is an employee's obligation to the employer to so conduct himself or herself that he or she can work peacefully and without wrangling with fellow employees.
For example, introduce your request with a phrase such as, "I'll understand completely if you're unable to help ..." And mean it. Be aware of relative height positions during conversations.
You'll be perceived as more intimidating if you're standing while others are sitting.
After the last operative report, the claimant was discharged.