This is the 347th most frequent Catalan word.
lluita
Struggle; fight; conflict.
Here, 'lluita' is used as a noun meaning 'the fight' or 'the struggle', referring to a collective effort against climate change.
La lluita contra el canvi climàtic és una responsabilitat global.
The fight against climate change is a global responsibility.
In this sentence, 'lluitar' is used as a verb meaning 'to fight', indicating the act of engaging in combat.
Els guerrers van lluitar amb gran valentia en la batalla.
The warriors fought with great bravery in the battle.
Here, 'lluita' is again a noun, but it refers to an individual's mental or emotional struggle rather than a physical fight.