The word "nigglings" is spelled with two consonant clusters: "ng" and "gl". The first cluster is represented by the letter combination "ng", which is pronounced with a velar nasal sound followed by a voiced velar plosive. The second cluster is represented by "gl", which is pronounced with a voiced velar plosive followed by a lateral approximant. The IPA phonetic transcription of "nigglings" is /ˈnɪɡlɪŋz/. Despite the complexity of its spelling, "nigglings" is a relatively uncommon word that refers to petty criticisms or complaints.
There seems to be no word "nigglings" in English. It could be a typo or a misspelling of another word. However, a similar word is "niggling", which derives from the Old Norse word "gnækja", meaning to complain or grumble. Over time, it evolved into English and came to mean something annoying, bothersome, or trivial.