This is the 11098th most frequent Catalan word.
substituiran
"Substituiran" means "they will replace" in English.
In this sentence, 'substituiran' indicates the action of replacing or exchanging one item for another.
Els estudiants substituiran els llibres vells per nous.
The students will replace the old books with new ones.
Here, 'substituiran' expresses the concept of substitution, where new elements take the place of older ones.
Les noves tecnologies substituiran les antigues.
New technologies will replace the old ones.
This usage shows 'substituiran' as referring to someone taking the place of others temporarily or permanently.