carina

Etymology
Borrowed from. .

Noun

 * 1) A longitudinal ridge or projection like the keel of a boat.
 * 2)  Part of a papilionaceous flower consisting of two petals, commonly united, which encloses the organs of fructification.
 * 3)  The keel of the breastbone of birds.
 * 4)  Any of several features that have a projecting central ridge

Etymology
From.

Noun

 * 1) keel of a ship
 * 2)  ship

Etymology
, because customs was originally paid to the emperor.

Noun

 * 1) customs