If someone niggles you, they annoy you by continually criticizing you for what you think are small or unimportant things. I don't react anymore when opponents try to niggle me You tend to niggle at your partner, and get hurt when he doesn't hug you. Niggle is also a noun. The life we have built together is more important than any minor niggle either of us might have
If something niggles you, it causes you to worry slightly over a long period of time. I realise now that the things which used to niggle and annoy me just don't really matter It's been niggling at my mind ever since I met Neville in Nice The puzzle niggled away in Arnold's mind. Niggle is also a noun. So why is there a little niggle at the back of my mind?