overburden
Concise Oxford English Dictionary © 2008 Oxford University Press:
overburden/əʊvəˈbɜːdn/
▶verb burden excessively. ▶noun
- 1 rock or soil overlying a mineral deposit, archaeological site, etc.
- 2 an excessive burden.
– derivatives
overburdensome adjective.
overburdensome adjective.
'overburden' also found in these Oxford entries:

