Abarim Publications' online Biblical Greek Dictionary
The noun ναυς (naus) means ship (Acts 27:41 only) and comes from the otherwise unused verb ναω (nao), meaning to flow.
This verb's parent verb, namely ναιω (naio) meaning to overflow or be full, happens to be the same as the also unused verb ναιω (naio), meaning to dwell, which is the parent of the noun ναος (naos), literally meaning dwelling but in practice usually denoting a temple.
From our noun ναυς (naus) derive:
- Together with the noun κληρος (kleros), which denotes a lot or mark of ownership: the noun ναυκληρος (naukleros), meaning ship owner or person who decides about a ship's freight and passengers (Acts 27:11 only).
- The noun ναυτησ (nautes), meaning sailor (Acts 27:27, 27:30 and Revelation 18:17 only).