Englishfor English speakers
importance
Noun
—
The importance of something, is how important it is.
of
Preposition
—
Made using.
It is a house of cards.
invention
Noun
—
something that has been invented
Nowadays, we can buy new inventions as soon as they are made.
—
the action of inventing something
—
the ability to invent
It took quite a bit of invention to come up with the toothbrush.