This is the 18503rd most frequent Russian word.
яхта
"Яхта" (yachta) - yacht.
The word 'яхта' is used as the subject in the sentence, referring to a boat designed for luxury or leisure sailing.
Яхта плыла по совершенно спокойной воде.
The yacht sailed across perfectly calm waters.
The word 'яхту' is used as the object of the verb 'арендовали', indicating the entity being rented, with the form changing due to the accusative case.
Мы арендовали яхту на неделю для нашего отпуска.
We rented a yacht for a week for our vacation.
Here, 'яхту' is also used in the accusative case as the object of the verb 'показывала', and is specified with the possessive 'свою' meaning 'her own' yacht.