'independently-attached' originates from the combination of 'independent' and 'attach,' where 'independent' means 'not relying on others' and 'attach' means 'to fasten or join.'

'independent' and 'attach' were combined in modern English to form the compound adjective 'independently-attached.'

Initially, 'independent' meant 'free from outside control,' and 'attach' meant 'to join or fasten.' The compound form retains these meanings, emphasizing a connection that does not rely on external support.