The biggest determining-factors for whether a woman will feel 'safe' with a man.

[mr_engineer]

I think there are two biggest factors. 

• Whether or not the man is willing to do everything in his power to ensure her well-being or not, i.e. whether he's ready to commit (This is the definition of 'readiness' according to me, by the way, is whether or not you're willing to do it), and 
• Whether or not there is compatibility between what the man wants to do for her and what the woman wants from him. 

There I said it.