Answer:
a mistaken belief, especially one based on unsound argument
Step-by-step explanation:
study the parts of this word
fallacy
first part is fall. The greek root word for fall means to trick
acy. The greek root word for this is state of being
You can refer back to other words you know that end in "acy", then see how they relate to "fallacy"
examples: aristocracy, aliteracy, legacy