naggle1
/ˈnaɡl/rare
noun
Pettiness, nagging.
Origin
Mid 19th century; earliest use found in The Pall Mall Gazette. Probably from naggle (although this is first attested slightly later). Compare slightly later naggling.
naggle2
/ˈnaɡl/Chiefly British regional
verb
[no object] To gnaw, bite.
Origin
Mid 19th century; earliest use found in John C. Atkinson (1814–1900), author and antiquary. From nag + -le.