Normally "y" is changed to "ies". There are exceptions, such as "journeys". Also personal names are not so changed: "Penny" becomes "Pennys", if you have more than one person named Penny.
For most nouns ending in "y," you change the "y" to "i" and add "es" to form the plural. For example, "city" becomes "cities" and "baby" becomes "babies."
yummy
The "s rule" typically refers to the spelling rule that governs how s is used at the end of words. When a word ends in a vowel plus y, the plural form is created by simply adding an s (e.g., day → days). When a word ends in a consonant plus y, the plural form is created by changing the y to i and adding es (e.g., baby → babies).
The general rule for nouns ending in "y" preceded by a consonant is to drop the "y" and add "ies" to form the plural. Some examples are:city = citiesmemory = memorieslady = ladiesparty = partiesThe exception to this rule is for the names of people. If a name ends in "y", an "s" is added to the end of the word, whether the "y' is preceded by a consonant or a vowel; for example, the two Marys or the Kennedys.For nouns ending in "y" preceded by a vowel, an "s" is added to the end of the word to form the plural. Some examples are:chimney = chimneyskey = keystoy = toysway = ways
by, my
When a suffix is added to a word ending in a consonant the y changes to an I.
When the word angry is changed into the adverb angrily, the y in angry becomes an i; the applicable rule is that when you add a suffix onto a word that ends in y, you change the y to an i.
The basic rule is for nouns ending in 'y' preceded by a consonant, the plural is formed by dripping the 'y' and 'ies'. For nouns ending in 'y' preceded by a vowel, the plural is formed by adding 's' only. Why this came about, I do not know. Perhaps a question for the category 'word origins'.Some examples for nouns that drop the Y and add IES for plurals are:babiesdaisiesladiesstoriesdairiesfairiespartiescountriesSome examples for nouns that do not drop the Y for plurals:alleysboyschimneysdaysessaysjoyskeysmonkeys
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
they
artsyberrycarrycampydairydiarydecoydecaydelayemeryenemyemptyfunnyfishyfierygloryhairyhurryironyjollyjellylousyluckymaybenastyovarypeonypaddypettyqueryrainyreadyrunnyrallyseedysaltysunnysavvystorystrayteenytallyunityunifywimpywispy
The word is spelled laziness. The base word is lazy. When adding "-ness" to a word ending in "y", the "y" changes to an "i".