teg

1. (in sport) weight
   Tri puta nedeljno dižem tegove u teretani. — I lift weights at the gym three times a week.
2. (for scales) weight
   Prodavac je stavio teg od kilograma na vagu. — The seller put a one-kilo weight on the scale.

In the gym sense it is usually plural: dizati tegove (to lift weights).