S / subnūbĭlus
adjective

subnūbĭlus

fem. sub-nūbĭla · neut. sub-nūbĭlum
somewhat; cloudy; overcast
somewhat cloudy or overcast, rather gloomy: nox, * Caes. B. C. 3, 54: limes, Ov. R. Am. 599.