From un- + officious. Rhymes: -ɪʃəs <span class="searchmatch">unofficious</span> (comparative more <span class="searchmatch">unofficious</span>, superlative most <span class="searchmatch">unofficious</span>) Not officious....
From <span class="searchmatch">unofficious</span> + -ness. <span class="searchmatch">unofficiousness</span> (uncountable) The quality of being <span class="searchmatch">unofficious</span>....
From <span class="searchmatch">unofficious</span> + -ly. <span class="searchmatch">unofficiously</span> (comparative more <span class="searchmatch">unofficiously</span>, superlative most <span class="searchmatch">unofficiously</span>) In a way that is not officious....