niddle
/ˈnɪdl/Scottish and Irish English (northern )
verb
[no object] To fiddle, toy, or fidget, especially with the fingers; to busy oneself in a pointless manner. Also with object: to fiddle with (the fingers, etc.).
Origin
Early 19th century; earliest use found in John Jamieson (1759–1838), antiquary and philologist. Origin uncertain; compare -le and perhaps also fiddle, piddle, tiddle, etc.