IPA: /nɒnˈdɪtʃəbl/
KK: /nɑnˈdɪtæʧəbl/
Something that cannot be separated or removed from something else.
The nondetachable parts of the device make it more durable.
Nondetachable → It is formed from "non-" (meaning not) and "detachable" (from Latin "detachare", meaning to unfasten or separate). The word "nondetachable" means something that cannot be unfastened or separated.
Think of 'not' ('non-') being added to 'detachable', which means something that can be unfastened. So, nondetachable refers to something that cannot be unfastened.