The ordinal number of "2"
second
What is this floor?
ground floor
What are they doing?
They are roller skating.
What is it doing?
It is crying.
What is the opposite of "old"?
young
The ordinal number of "5"
fifth
What is he doing?
He is hiding.
What is he doing?
He is walking.
What is this floor?
basement
What is he doing?
He is dancing.
The ordinal number of "3"
third
The ordinal number of "1"
first
What is the opposite of "tall"?
short
The ordinal number of "4"
fourth
What is the opposite of "big"?
small