Multiline data from file to another file

Shell Programming and Scripting
1

Hello

I have a file which contains following data:

abc,1234,adf
abc,214,fdff
abc,455,adff

I need to replace KEYWORD from other with following data :

1234,adf
214,fdff
455,adff
2

What "keyword from other" ? What have you tried?

3

What is your expected result? I see two input files (possibly)? Please clarify.

4

KEYWORD is word which exists in another file.
Actually I have to replace this word with

1234,adf
214,fdff
455,adff

so far I have tried

sed -e '/KEYWORD/r file1' file2

here file1 is file which contains

abc,1234,adf
abc,214,fdff
abc,455,adff

and file2 is file where KEYWORD exists.

actually from this 'sed' command it copied all the data from file1 to file2 after KEYWORD line.

But I need to replace KEYWORD with some portion of file .