To Get Buried
To Be Buried, To Be Covered
intransitive verb, ichidan verb
You know that 埋める is "to bury." This verb is to get buried or to be buried. You know this because it's more rare (もれる) to get buried than it is for you to bury someone else. Really you can only get buried once, to be honest, because you're probably going to die.
埋もれる highlights the sense of something being hidden or obscured by being covered. So you could use it to describe a yard covered in snow or your talent being overshadowed in a competitive environment.
The reading comes from 埋める.
昨夜、雪が30cmも積もり、車が埋もれてしまいました。
The snow piled up 30 centimeters deep last night and my car got buried.