Colloquial examples include the common "un--believable" and variants of it; multiple English words are joined with the vulgar infix -fucking-, such as "". The phrase "A whole nother...(story / kettle of fish / ball game)" is an example of tmesis in English. The word "another" is being split by the qualifier "whole". The insertion is probably caused by the fact that the word consists of an indefinite article plus the word "other", and it is still easily analysable as such. But the word is still so much a unit that some speakers will find it incomplete to say "a whole other". And so, the word is reanalysed as "a nother" to keep the "n", which allows for the use of a qualifier while retaining all the letters of the word.