betonski

1. concrete
   Ispred zgrade je visok betonski zid. — There is a tall concrete wall in front of the building.
   Radnici su izlili betonsku ploču za garažu. — The workers poured a concrete slab for the garage.
2. colloq. (figurative) rock-solid; watertight
   Tim je igrao betonsku odbranu ceo meč. — The team played a rock-solid defence the whole match.
   Osumnjičeni ima betonski alibi. — The suspect has a watertight alibi.