hermetički

1. hermetically; airtight
   Teglu treba hermetički zatvoriti. — The jar has to be sealed airtight.
   Granica je bila hermetički zatvorena danima. — The border was sealed shut for days.

2. hermetic; airtight
   Kafa se prodaje u hermetičkom pakovanju. — The coffee is sold in airtight packaging.
3. formal (of texts, art) hermetic; obscure
   Njegova poezija je previše hermetička za širu publiku. — His poetry is too obscure for a wide audience.

Most often found in the phrase hermetički zatvoren.