See the entire entry for ṭmˁ vb. to be swallowed up, sink

PJ Deut21:1 :ארום ישתכח קטילא בארעא דלא טמיע באוגרא : should a dead body be found in the ground that is not buried under a monument

See the entire entry for yḡar, yaḡrā n.m. heap