shadowy
From LSJ
faint, dim: P. ἀμυδρός, V. ἀμαυρός, P. and V. ἀσαφής.
spectral: Ar. and P. σκιοειδής.
shadowy spectres: P. σκιοειδῆ φαντάσματα (Plato).
dark: P. and V. σκοτεινός, P. σκοτώδης; see dark.
vague, ill-defined: P. and V. ἀσαφής, ἄδηλος, V. ἄσημος; see obscure.