IPA: /nɒn kənˈvɜːtəbl/
KK: /nɑn kənˈvɜrtəbl/
Something that cannot be changed or exchanged for something else.
The bonds issued by the company are nonconvertible, meaning they cannot be exchanged for stock.
Nonconvertible → It is formed from "non-" (meaning not) and "convertible" (from Latin "convertere", meaning to turn around or change). The word "nonconvertible" means not able to be turned into or changed into another form or use.
Think of 'not' ('non-') being added to 'convertible', which means something that can be changed. So, nonconvertible refers to something that cannot be changed.