There are no specific rules to be followed for words ending in "ely". Most of the root words ending in E add -ly whereas words ending in Y replace the Y with an I before adding the -ly. Examples: complete => completely icy => icily hungry => hungrily
No, it doesn't. Adding a y to the end of a word usually makes it an adjective. Example: rain to rainy (It was a rainy day.) Smell to smelly, sun to sunny Many adjectives also end in a y, but usually have an -ly at the end. example: fastly, quickly, steadily, etc.