Synonyms for Indistinct (same or very similar meaning)
WordNet sense 1 (indistinctly understood or felt or perceived):
faintWordNet sense 2 (lacking clarity or distinctness):
dim, vagueWordNet sense 3 (lacking definite form or limits):
nebulousWordNet sense 4 (indistinct or hazy in outline):
blurred, fuzzy, hazyFrom the ODE community, based on WordNetadd/edit