What word class part of speech is the in sentence waiver customs duties was

The word "the" in the sentence "waiver customs duties was" is a definite article.

Here's why:

* Articles are words that precede nouns to specify whether the noun is singular or plural and whether it is definite (specific) or indefinite (non-specific).

* Definite articles (like "the") refer to a specific noun that is already known or understood by the listener or reader.

* Indefinite articles (like "a" or "an") refer to any one of a class of nouns.

In this sentence, "the" is used to specify a particular waiver of customs duties, implying that it is known or understood in the context of the conversation.