ladder
The Italian word for ladder is 'scala'. It is a noun and is used in the same way as in English. For example, 'I need a ladder to reach the top shelf' translates to 'Ho bisogno di una scala per raggiungere lo scaffale più alto'.
I lost my mobile on the stairs.
In this sentence, 'scala' is used to mean 'stairs'. In Italian, 'scala' can have multiple meanings. Here, it refers to the series of steps leading from one floor of a building to another.
I need a ladder to reach the high shelf.
In this sentence, 'scala' is used to mean 'ladder'. Just like in English, the Italian word 'scala' can be used to refer to both a series of steps inside a building ('stairs'), and to a piece of equipment that is used for reaching high places ('ladder').
'Do/Mi' is the standard musical scale.
In this sentence, 'scala' refers to a 'scale' in music. In Italian, 'scala' can also refer to a sequence of notes that ascends or descends in pitch. 'Do/Mi' are the Italian names of the notes 'C' and 'E' respectively in the C major scale.