Pronunciation note Isn't is often pronounced /ˈɪdnt/Show Spelled[id-nt]Show IPA in the South Midland and Southern U.S., with /d/[d] a stop consonant, substituting for /z/[z] a sibilant. This substitution results from an assimilatory process in which the tip of the tongue, in anticipation of the articulatory position for the following /n/[n] touches the upper alveolar ridge. This same process gives /ˈwʌdnt/[wuhd-nt] for wasn't and /ˈbɪdnɪs/[bid-nis] for business. These pronunciations are heard from speakers on all social levels.