"vaguest" in the adjective sense
1. obscure, vague
not clearly expressed or understood
"an obscure turn of phrase"
"an impulse to go off and fight certain obscure battles of his own spirit"-Anatole Broyard
"their descriptions of human behavior become vague, dull, and unclear"- P.A.Sorokin
"vague...forms of speech...have so long passed for mysteries of science"- John Locke
2. undefined, vague
not precisely limited, determined, or distinguished
"an undefined term"
"undefined authority"
"some undefined sense of excitement"
"vague feelings of sadness"
"a vague uneasiness"
3. dim, faint, shadowy, vague, wispy
lacking clarity or distinctness
"a dim figure in the distance"
"only a faint recollection"
"shadowy figures in the gloom"
"saw a vague outline of a building through the fog"
"a few wispy memories of childhood"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
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