What is the word 'desu' when translated from Japanese to English?

Answer 1

It's a verb that means "is". For example "Kuruma wa aka desu" means "The car is red.", or literally translated "Car red is."
'Desu' does not really have a tangible meaning that could be readily translated into English. It is, instead, what is referred to in linguistics as a "copula," and in this case, functions as a polite copula. A copula connects a subject and a predicate.

Answer 2

It's like saying something is 'in a state of being'. eg, when someone asks you how you are, you say "Watashi WA (name) desu" because you are your name or saying "sore WA atsui desu" because 'it is hot'. I hope you understand what I mean.

Answer 3

"Desu" (pronounced, "dess") sort of means "is".

For instance, I could say, "Watashi wa CRiMCO desu", or "My name CRiMCO is".