My safari isn’t opening on my MacBook Air

Can you post the output of Etrecheck here, and that'll provide some information on the software and hardware configuration.

Has anything changed recently? Updates applied, new Safari add-ons added, etc?

Are any other apps also effected, or is this just Safari?

Does booting into Safe Mode allow Safari to work? And if it does, does shutting down and rebooting normally then resolve this?

Have you tried opening it from the Applications folder? Also try in another admin user account.