Abarim Publications' online Biblical Hebrew Dictionary
The particle ו (waw) is the most occurring verbal unit in the Bible. Its name means peg or hook and its shape resembles one, and its job is to tie words, statements and sentences together.
If this particle is placed in front of a word it means 'and' or any kind of conjunctive statement (so, as, when, but, then, etcetera).
If this particle is fixed after a word, it forms a possessive associated to the third person singular: his, hers or its.