sista

In a sentence

• Den sista bussen går klockan tio.

  The last bus departs at ten o'clock.

  Here, 'sista' is used as an adjective to denote the final item in a sequence of buses.

• Sista gången jag såg honom var förra året.

  The last time I saw him was last year.

  In this case, 'sista' describes the final occurrence of an event, namely the act of seeing.

• Det var hennes sista försök, sedan gav hon upp.

  That was her last attempt, then she gave up.

  In this sentence, 'sista' modifies 'försök,' meaning that it was the final attempt made.