Magical powers were once thought to 'be attached to' the stone. [=the stone was once thought to have magical powers]
Little credibility 'was attached to' his story. [=people did not think that his story was very credible]
The shy child 'attached' herself 'to' her mother [=stayed close to her mother] during the whole party.
(..) the inner lock hatch now. - Right. - Hey, Ripley. We're clean. Let us in. - Right here. - What happened to Kane? - Something has attached itself to him. - We have to get him to the infirmary right away. - What kind of thing? - I need a clear definition. - An organism. Open the hatch. (..)1979 Alien