As I know, the word word can be understood as
vocabularyunit of meaning
A single distinct meaningful element of speech or writing, used with others (or sometimes alone) to form a sentence and typically shown with a space on either side when written or printed.
- statement / sentence
Something spoken or written; a remark or statement.
What make me confused is that how can I distinguish these two different meanings in case like this one:
A friendly waiter taught me a few words of Italian.
- He taught me a few vocabularies of Italian.
- He taught me a few sentences/statements of Italian.