киштӣ

Киштии нав ба баҳр сар дода шуд.
The new ship was set afloat on the sea.
Баъди чанд соли кашфи Амрико, киштиҳои Васко да Гама Африкоро давр зада, ба Ҳиндустон расиданд.
Several years after the discovery of America, the ships of Vasco da Gama went around Africa and arrived at India.

Bonus:
If a word that ends in ӣ has a suffix attached to it then the ӣ is changed to an и, as in киштиҳо and киштии нав.

киштии бодбонӣ: sailing ship
киштии бухорӣ: steamship
киштии зиреҳпӯш: armoured ship
киштии зериобӣ: submarine (ship)
киштии нафткашонӣ: oil ship, oil tanker
киштии яхшикан: icebreaker ship

киштисоз: shipbuilder
киштисозӣ: shipbuilding