Pronunciation note: Isn't is often pronounced/ˈɪdnt/Show Spelled Pronunciation[id-nt]Show IPAin 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.
[iz-uh
nt] 
