What is A syllable added to a root word change its meaning?

It's not always about adding a syllable, but about adding a suffix. A suffix is a group of letters added to the end of a word, which can change its meaning, grammatical function, or both.

Here's how suffixes change meaning:

* Nouns: Adding suffixes like "-er", "-or", "-ist", "-tion", "-ment", "-ness" can turn verbs into nouns. For example: "act" (verb) becomes "actor" (noun).

* Adjectives: Suffixes like "-ful", "-less", "-able", "-ible", "-ous", "-y" can create adjectives from nouns or verbs. Example: "care" (noun) becomes "careful" (adjective).

* Verbs: Suffixes like "-ize", "-ify", "-en" can turn nouns or adjectives into verbs. Example: "modern" (adjective) becomes "modernize" (verb).

Example:

* Root word: "Happy" (adjective)

* Suffix: "-ness"

* New word: "Happiness" (noun)

Important Note:

While adding a suffix often changes the meaning, it doesn't always add a syllable. For example, the word "cat" becomes "cats" by adding the plural suffix "-s" without adding a syllable.