be undecided about something; waver between conflicting positions or courses of action;"He oscillates between accepting the new position and retirement"
move to and fro;"The shy student lingered in the corner"
hang in the air; fly or be suspended above
be suspended in the air, as if in defiance of gravity;"The guru claimed that he could levitate"
hang over, as of something threatening, dark, or menacing;"The terrible vision brooded over her all day long"