phantasmagorial, penultimate, cranioectonemy, injection, retaliate, standoffish
If you think that the object that you describe si big then you can use
A common Japanese word for big is 'ookii.'
Words for a big change are "transmutation," "metamorphosis," or "innovation." When dealing with a character who has had a realization that leads to a big change, the word to use is "epiphany."
The gallery was very big.
A "sesquipedalian".
"Appositives is a sort of big word"
Big, awesome, green, etc.
We will designate her in the big crowd.
the man had a big beard!
You're in big trouble!
a big scud of rain will fall
I backed away from the big dog.