Computer is indispensable to modern life.
She's quite indispensable to the company.
In football teamwork is even more important than individual skill.
We use individual towels.
What induced you to do such a thing?
Don't indulge yourself too much.
He's quite inept at tennis.
Helium and neon are inert gases.
Death is inevitable.
My will inexorable.
Tourism was then still in its infant stage.
Infant mortality has been dramatically reduced.
His flu infected his wife.
Laughter is infectious. .
From his manner, we drew the inference that he was satisfied.
A colonel is inferior to a general.
Nobody is inferior to you here.
What an infernal lie!
Our dormitory is infested with rats.
Infinite space surrounds the Earth.