陰 is a shadow, and adding お to it and makes it honorific. It becomes the shadow of someone very important, and means thanks to, as in "thanks to you, I was able to pass the test." This originally comes from the idea of being in the shadow of the gods, who are protecting you and helping you out!
If that's hard to remember, think about shade helping you out. Perhaps thanks to the shade you were able to survive the heat of the desert.
The reading comes from the word 陰. Thanks to that other vocab word, you can read this one!
Thanks to your taking care of my kid, Ms. Date, I could do my shopping freely.
Because of the down quilt that my parents gave me, it’s really hard to get out of bed these days.
Thanks to everyone, we could go to the quarter-finals of the Japan National High School Baseball Tournament held in Koshien stadium.