This is the 5384th most frequent Swedish word.
ex
Former partner.
Here, 'ex' is used to refer to a former partner in a relationship.
Min ex var väldigt snäll och hjälpsam.
My ex was very kind and helpful.
In this sentence, 'ex' is short for 'exempel', meaning 'example', commonly used in informal contexts.
Vi använde en gammal ex från förra året för det nya projektet.
We used an old example from last year for the new project.
Here, 'exempelvis' incorporates 'ex' implicitly within the word to denote 'for example'.