This is the 1079th most frequent Catalan word.
ampliar
To expand or enlarge.
Here, 'ampliar' is used to indicate physically expanding or increasing the size of an object, in this case, a house.
Volem ampliar la nostra casa per tenir més espai.
We want to extend our house to have more space.
In this sentence, 'ampliar' is metaphorically used for increasing or expanding one's intellectual or informational breadth, specifically knowledge.
Podem ampliar els nostres coneixements estudiant idiomes.
We can broaden our knowledge by studying languages.
This use of 'ampliar' signifies extending influence, activity, or coverage, here referring to a company's market reach.