This is the 3104th most frequent Catalan word.
oxigen
"Oxygen."
Here, 'oxigen' is used as a noun referring to the element necessary for respiration.
L'oxigen és essencial per a la supervivència dels éssers vius.
Oxygen is essential for the survival of living beings.
In this sentence, 'oxigen' refers to the compressed gas carried in tanks to facilitate breathing.
Els submarinistes porten ampolles d'oxigen per poder respirar sota l'aigua.
Divers carry oxygen tanks to be able to breathe underwater.
Here, 'oxigen' is used to describe the reduced availability of the gas in high-altitude environments.