How to make one key stroke emit 3 unicode character in a custom keyboard layout in Linux mint?

I have created a custom keyboard layout for my regional language by editing different files. It works fine except for one problem. One of the characters needs 3 unicode characters in combination I.e. I want all the 3 characters to be emitted in single key stroke. Please help me to do so. The characters are as follows ক + ্ + ষ -- ক্ষ U0995 + U09CD + U09B7 -- ক্ষ This combination needs to be emitted from the third character of the key key AB04 , shown below. I added language file to /usr/share/X11/xkb/symbols and entry to the /usr/share/X11/xkb/rules/evdev.xml file extract from the file I added

Question by Ritu Lahkar on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.