cemetery
塋 centers on a burial ground: a cemetery or grave site.
塋 combines 土 (earth, ground) with a phonetic component that likely contributed the sound エイ. The character is used specifically for a grave or cemetery, where earth is central.
The bottom 土 is earth, and the top looks like a flame over a cover. Picture a flame-lit covered mound of earth marking a cemetery.
For エイ, imagine an eerie (エイ) cemetery at night: the eerie sound cues エイ, and the earth mound marks the grave.