skulduggery
Concise Oxford English Dictionary © 2008 Oxford University Press:
skulduggery /skʌlˈdʌg(ə)ri/ (also skullduggery)
▶noun underhand or unscrupulous behaviour; trickery.
– origin C19: alt. of Scots sculduddery, of unknown origin.
'skulduggery' also found in these Oxford entries:

