hornet
Concise Oxford English Dictionary © 2008 Oxford University Press:
hornet/ˈhɔːnɪt/
▶noun a large wasp which is typically red and yellow or red and black and usually nests in hollow trees. [Vespa crabro (Europe) and other species.]
– phrases
stir up a hornets' nest provoke opposition or difficulties.
stir up a hornets' nest provoke opposition or difficulties.
– origin OE hyrnet, of Gmc origin.
'hornet' also found in these Oxford entries:

