IPA: /ɪnˈæpəʊzɪtnəs/
KK: /ɪnˈæpəʊzɪtnəs/
The condition of being unsuitable or not appropriate for a particular situation.
The inappositeness of his comments during the meeting was evident to everyone.
Inappositeness → It is formed from "in-" (meaning not), "apposite" (from Latin "appositus", meaning suitable or appropriate), and "-ness" (meaning the state of being). The word describes the state of being not suitable or appropriate.
Think of 'not' ('in-') being combined with 'suitable' ('apposite') to remember that 'inappositeness' means the state of being unsuitable.