形容詞 unaided:

1. carried out without aid or assistance

1. An optical instrument that uses a lens or a combination of lenses to produce magnified images of small objects, especially of objects too small to be seen by the unaided eye.
   顯微鏡用一個透鏡或一些透鏡的組合來制造小物體的放大形像的視力工具，通常用來觀察肉眼看不到的物體
2. The baby cannot sit unaided she has to be propped up on pillows.
   那嬰兒還不會坐--得讓她倚著枕頭才行。