They seem opposites. And that's what this one, basically, means, " ob" . When we look at here, and we look at this word, " obvious" , " obvious" , it means " toward easy to see" .
Anyway. A quick review because we've got to go, all right? So " ad" means " to" or " toward" , all right? " Com" means " with" or " together" . " Ob" means " against" or " toward" . I know.