This is the 1528th most frequent Catalan word.
calent
"Calent" means "hot" in English.
Here, "calent" is used metaphorically to mean current or urgent, describing the nature of the topic.
És un tema encara molt calent en l'actualitat.
It is still a very hot topic nowadays.
The word "calenta" is the feminine singular form of "calent" and indicates that the cup has a high temperature.
La tassa està massa calenta per agafar-la ara.
The cup is too hot to grab it now.
In this context, "calent" means "hot" or "warm" referring to the temperature of the meal.