(the highest point (of something)

Synonym: Peak

Antonym: Bottom, Floor

Sentence: It took us over 2 days to hike up to the apex of the mountain.

A member of the middle class

Synonym: Middle-class

Antonym: Lower-classmen, Upper-classmen

Sentence: The bourgeois group of nomads are heading into Egypt.

Cease to exist

Synonym: Dead

Antonym: Alive

Sentence: This town we are looking for is said to be defunct.

Any animal belonging to the dog family

Synonym: Dog

Antonym: Feline

Sentence: My canine is my best friend and he is very faithful.

lacking in quality.

Synonym: exiguous

Antonym: stingy

Sentence: All the poor kids in africa have a meager food supply.

Flowing in

Synonym: Inflow

Antonym: Outflow

Sentence: The influx of people into the stadium was massive.

Destroy completely, wipe out

Synonym: Eliminate

Antonym: Preserver, save

Sentence: The dinosaurs were completely obliterated the ice age and a asteroid.

To change into bone, harden like bone

Synonym: rigid, petrify

Antonym: fossil

Sentence: The ossified fragment of his jaw is missing.

To become aware of

Synonym: Comprehend

Antonym:

Sentence: I could perceive from my moms expression that I was in trouble.