IPA: /ɪnˈdɪstɪŋktɪv/
KK: /ɪnˈdɪstɪŋktɪv/
Not having unique or special features that set something apart from others.
The painting was indistinctive, blending in with the many others in the gallery.
Indistinctive → It is formed from "in-" (meaning not) and "distinctive" (from Latin "distinctivus", meaning distinguishing or differentiating). The word "indistinctive" means not distinguishing or lacking the ability to differentiate.
Think of 'not' ('in-') being combined with 'distinguishing' ('distinctive') — that's why indistinctive means something that does not stand out or differentiate.