strictly
adverb /ˈstrɪktli/
  /ˈstrɪktli/
Idioms - with a lot of control and rules that must be obeyed- She was brought up very strictly.
- The industry is strictly regulated.
 
- used to emphasize that something happens or must happen in all circumstances synonym absolutely- Smoking is strictly forbidden.
- My letter is, of course, strictly private and confidential.
 
- in all details; exactly- This is not strictly true.
 
- used to emphasize that something only applies to one particular person, thing or situation synonym purely- We'll look at the problem from a strictly legal point of view.
- I know we're friends, but this is strictly business.
- Their relationship is strictly platonic.
 
Idioms 
strictly speaking 
- if you are using words or rules in their exact or correct sense- Strictly speaking, the book is not a novel, but a short story.
- Using the word in that context is not, strictly speaking, correct.