<u>1. Unfamiliar word : </u>felidae
<u>Part of speech : </u> Noun ( proper noun)
<u>Definition/Meaning :</u> Felidae is a family of mammals in the order Carnivora, colloquially referred to as cats, and constitutes a clade. A member of this family is also called a felid. The term "cat" refers both to felids in general and specifically to the domestic cat (Felis catus).
<u>2. Unfamiliar word :</u> Predynastic period
<u>Part of the speech: </u>Noun (proper noun)
<u>Definition/Meaning:</u>The Predynastic Period of Ancient Egypt (prior to 3100 BC) is traditionally the period between the Early Neolithic and the beginning of the Pharaonic monarchy starting with King Narmer.
<u>3. Unfamiliar Word:hypothesis</u>
<u>Part of speech:</u> Noun(common noun)
<u>Definition/Meaning : </u>A hypothesis is something more than a wild guess but less than a well-established theory.
<u>4.Unfamiliar Word: fertility</u>
<u>Part of speech: </u>Noun(common noun)
<u>Definition/Meaning:</u>the ability to conceive children or young.