What أَدْعِيَا ,أُمَّهَا and
فَإِخْوَا actually mean?

[Mahanoor]

Salam and peace to all,

In chapter 33 AlAhzaab. The word use in verse 334 and 5 and respectively as adopted son.
And another word use in another verae

3346

in meaning of calling people toward Allah. Are these two same or different?

Why didn't take I'm meaning of ummah "nation or foundation" as it took in 37.

37

It is He who has sent down to you, , the Book; in it are verses precise - they are the foundation of the Book - and others unspecific......

And in it Is the same as AKHOOAT which mean unity, Why it has taken as "brother"?

Thank you.

[Timotheus]

Peace, I recommend looking up the roots in a lexicon, words in Arabic vary in their usage, and often are not precisely literal,

D3w means to call, hence all the words that derive from it are based on calling, such as calling someone to islam, calling on God, calling out to a person, or calling people your sons.

I recommend reading the intro to the ancient Hebrew lexicon of the bible, if you understand the concept and mentality of Semitic language and the essence of the roots themselves, it helps to understand how you get the meanings you do out of the roots.