nubilous
[adjective]
Synonyms: overcast, cloudy, dowly, dull, heavy, lowering (or louring), overclouded, obscure, ambiguous, double-edged, double-faced, equivocal, tenebrous, uncertain, unclear, unintelligible, vague

[TahlilGaran] English Synonym Dictionary ▲

nubilous adjective. ['nju:bɪlǝs] Now rare. M16.
[from Latin nubilosus or nubilus, from nubes cloud: see -OUS, cf. -OSE¹.]
Cloudy, foggy, misty; fig. obscure, indefinite.

[TahlilGaran] English Dictionary ▲