urlop - leave (masculine noun)

 I have just had a week off work.  Foreign travel was banned, so I did not go anywhere.  

I did not vacate my home.  I was not on vacation.  Nie byłem na wakacjach.

I was on holiday / leave.  Byłem na urlpie.

Declension

case	singular	plural
nominative	urlop	urlopy
genitive	urlopu	urlopów
dative	urlopowi	urlopom
accusative	urlop	urlopy
instrumental	urlopem	urlopami
locative	urlopie	urlopach
vocative	urlopie	urlopy

Jadę na urlop - I'm going on holiday.

Przydałby mi się jakiś urlop - I could use some time off.

(literally: Some leave would be useful to me)

Here przydałby się is reflexive.  Note that the conjugation of przydać się agrees with the thing that would be useful.  In this case urlop, which is a masculine noun.

Diminutive: urlopik

case	singular
nominative	urlopik
genitive	urlopiku
dative	urlopikowi
accusative	urlopik
instrumental	urlopikiem

Opinion seems divided on whether to use the diminutive incase it sounds too cutesy or not.  

Leave could also be called wolne.