To Overlook
transitive verb, godan verb
逃す is "to let go" or "to let escape." If something escapes your seeing, then you are going to overlook it.
みのがす
The reading comes from 見 and 逃す.
その法律に抜け穴があることを今の今まで見逃していました。
I hadn’t noticed that there was a loophole in the law until now.