trostruk

1. triple; threefold
   Sada plaćamo trostruku cenu. — We now pay three times as much.
   Naručio sam trostruki espreso. — I ordered a triple espresso.
2. (of a winner, champion) three-time
   On je trostruki olimpijski šampion. — He is a three-time Olympic champion.

Usually used in the definite form: trostruki, trostruka, trostruko.