underbury means to bury beneath; bury under. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
Etymology
From under- + bury.
verb
- To bury beneath; bury under.“When the marriage act was mooted, Keith swore that he would revenge himself upon the bishops, by taking some acres of land for a burying-ground, and underburying them all.”