A verse and its Tafsir
Allah the Exalted says
“Wheresoever ye may be, death will overtake you, even though ye were in lofty towers. Yet if a happy thing befalleth them they say: This is from Allah; and if an evil thing befalleth them they say: This is of thy doing (O Muhammad). Say (unto them): All is from Allah. What is amiss with these people that they come not nigh to understand a happening?” (4:78)
Meaning: you are all inevitably headed toward death
And not one of you shall escape it
“Wheresoever ye may be, death will overtake you, even though ye were in lofty towers. Yet if a happy thing befalleth them they say: This is from Allah; and if an evil thing befalleth them they say: This is of thy doing (O Muhammad). Say (unto them): All is from Allah. What is amiss with these people that they come not nigh to understand a happening?” (4:78)
Meaning: fortified, impregnable, lofty, and elevated
It has been said that "al-mushayyadah" is the same as "al-mashidah"
Just as the Exalted says
"And a lofty palace"
Yet it is said that there is a difference between the two
Which is that "al-mushayyadah," with the shaddah, means "extended" or "heightened"
While "al-mashidah," with the light consonant, means "decorated with plaster"
Which is gypsum
Tafsir Ibn Kathir