Caupo of Turaida died in 1217.
No, it means 'innkeeper.'
Third declension.
First declension.
Mare (sea) is 3rd declension.
'Tempus' is third declension.
The Latin word caupo means "a petty tradesman". The commonest derivative of this in modern English is the word "cheap". Old English had the word ceapian, meaning "to trade", which represents an early borrowing of caupo into Germanic (German still has the word kaufen, "to buy", from the same source). The expression "god chep" in Middle English meant "a good bargain", and this led "cheap" to develop its modern sense of "inexpensive".
Third declension.
Consul, consulis is third declension.
Declension is a noun. In grammar, it refers to the changing of the form of a word to express different grammatical categories such as gender, number, and case.
Yes, declension is of a major importance
Esse is the verb "to be". Only nouns are declined, therefore it is in no declension.