A wife is a woman lawfully and legally married to a man. Every wife is prima facie a woman but not every woman is a wife. The Holy Bible which is the everyday living manual for the Children of God on all aspects of life whether spiritual or physical (including marriage affairs) has spelt out detailed instructions on how marriage as a whole should work if it is to function properly and succeed, the roles and responsibilities of both the husband and wife and how a wife if she is to build up her home and bring favour as well as God's blessings on her husband and entire household must conduct herself.
According to the Bible which is the living word of God, a wife is the only person God calls a helper (or a helpmeet) to another individual (who must be her husband) after the Holy Spirit ( who Himself is God and the third person of the Holy Trinity).