WISPY
dim, faint, shadowy, vague, wispy
(adjective) 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”
wisplike, wispy
(adjective) thin and weak; “a wispy little fellow with small hands and feet”- Edmund Wilson
Source: WordNet® 3.1
Etymology
Adjective
wispy (comparative wispier, superlative wispiest)
Consisting of or resembling a wisp; like a slender, flexible strand or bundle.
Source: Wiktionary