niggle

1 niggle /ˈnɪgəl/ verb
niggles; niggled; niggling
1 niggle
/ˈnɪgəl/
verb
niggles; niggled; niggling
Britannica Dictionary definition of NIGGLE
1 
: to worry or annoy (someone)
[+ object]
[no object]
— often + at
2 
[no object] : to argue or make criticisms about something that is not important
2 niggle /ˈnɪgəl/ noun
plural niggles
2 niggle
/ˈnɪgəl/
noun
plural niggles
Britannica Dictionary definition of NIGGLE
[count] chiefly British
1 
: a slight feeling of something (such as doubt)
2 
: a slight pain
3 
: a small criticism or complaint