This is the 5075th most frequent Spanish word.
extenderán
"They will extend"
The word 'extenderán' here is used in the third person plural future tense, meaning 'they will extend', in the context of expanding or spreading out something to make it reach a wider area or scope.
Los agricultores extend harán los sistemas de riego para cubrir más campos.
The farmers will extend the irrigation systems to cover more fields.
In this sentence, 'extenderán' is used in the future tense implying the action of spreading or unrolling something, such as a carpet, for a ceremonial purpose.
Extenderán la alfombra roja antes de que lleguen los invitados de honor.
They will lay out the red carpet before the guests of honor arrive.
Here, 'extenderán' describes a natural growth progression, signifying that the branches will physically grow and surpass the limitations of the fence.