A drumming with the fingers or feet.

An area that is dangerous and where people or vessels may disappear. / A set of three things considered dangerous.

The plant mandrake, especially when used in black magic.

plural of devil's candle

(mathematics, informal) Synonym of Cantor function; a type of monotonic increasing function.

A waterfall in Wassen Creek, Devil’s Staircase Wilderness, Siuslaw National Forest, Oregon, United States; a multi-tiered low cascading waterfall.

A village in Ceredigion, Wales (OS grid ref SN7376).

The orange hawkweed, Pilosella aurantiaca. / (slang, historical) A Maxim gun.

A legal requirement to achieve an impossible proof. Remedies are reversing the burden of proof, or giving additional rights to the individual faced with this requirement.

(Chicago, Maryland, New Jersey, coastal New England, and especially Michigan) A particular night, commonly the night of the 30th to the 31st of October, during which young people play pranks and do mischief in their neighborhoods.