To frighten or threaten someone, usually in order to persuade them to do something that you want them to do: (Cambridge Dictionary)
To make timid or fearful: Frighten. (Merriam – Webster)
If you intimidate someone, you deliberately make them frightened enough to do what you want them to do. (Collins Dictionary)
Frighten or overawe (someone), especially in order to make them do what one wants. (Oxford Dictionaries)
To make timid; fill with fear. (Dictionary.com)
6 Subtle Ways People Intimidate Each Other.