overcast (weather) / cloudy / shady / Yin (the negative principle of Yin and Yang) / negative (electric.) / feminine / moon / implicit / hidden / genitalia
阴
=
月
+
阝
:
Maud Younger (y) and the pope (阝) are out for a walk in front of the encampment ((e)n1). They are surprised that it is so dark and think that it must be quite cloudy (阴), but it is just the moon (月) which is floating above them and shielding off the sun.