prvý

In a sentence

• Je to môj prvý deň v práci.

  It is my first day at work.

  Here, 'prvý' is used as an ordinal number to indicate its sequential position as 'first'.

• Prvý na zozname je Jozef.

  The first on the list is Jozef.

  In this instance, 'prvý' identifies the initial position in a list, also reflecting an ordinal number usage.

• Bol som prvý, kto tomu porozumel.

  I was the first to understand it.

  Here, 'prvý' is applied to describe a unique priority or the initial instance of someone understanding something.