The "-ier" suffix is generally used in English for:
* Comparative Adjectives: These describe a greater degree of a quality. For example, "stronger," "faster," "prettier."
* Nouns: These often denote people or things performing a specific action. For example, "cashier," "songwriter," "baker."
Here's why this categorization exists:
* Historical Evolution: English has evolved over centuries, incorporating elements from Old English, Latin, French, and other languages. Suffixes like "-ier" often have their roots in Old French or Latin, where they marked comparative forms or designated professions.
* Grammatical Function: The "-ier" suffix often indicates a relationship to a base word. In comparative adjectives, it signifies a comparison, and in nouns, it often suggests an occupation or a person associated with an activity.
* Phonetic Consistency: The "-ier" suffix has a distinct phonetic sound in English, which helps distinguish it from other suffixes and makes it easier for speakers and readers to recognize its function.
Let me know if you have specific examples in mind. I can explain why those particular words belong in the "-ier" category.