This is the 8304th most frequent Catalan word.
descongelar
To defrost or to thaw.
Here, 'descongelar' is used literally to refer to the action of thawing or defrosting frozen food.
Cal descongelar el menjar abans de cuinar-lo.
It's necessary to thaw the food before cooking it.
In this instance, 'descongelar' is used metaphorically to describe the warming or improvement of relationships between the countries.
Les relacions entre els dos països van començar a descongelar-se després de la conferència.
The relations between the two countries started to thaw after the conference.
Here, 'descongelar' is metaphorically applied to the process of revisiting or bringing back an old idea to reuse it creatively.