While the English lexicon boasts a vast array of suffixes, terminal orthographic sequences like “-who” are exceedingly rare. In fact, no standard English words conclude with these two letters. Constructions mimicking this pattern often appear in informal contexts, creative writing, or as intentional neologisms, but they lack conventional dictionary recognition.
Understanding the constraints of word formation is essential for clear communication. Recognizing which letter combinations are permissible at the end of words allows for greater precision in language use and aids in identifying unconventional or invented vocabulary. This knowledge base benefits both language learners and those interested in the evolution and structure of English. Historically, affixation and word endings have played a crucial role in the development of the language, and awareness of these processes offers a deeper understanding of its complexity.