Asher is a relative pronoun meaning who, which, that, or where. It is one of the most common words in the Old Testament, appearing over 5,500 times. It functions as a connector in Hebrew syntax, linking clauses and identifying subjects.
In Exodus 3:14, God's self-revelation 'I AM WHO [asher] I AM' uses this word to express the mystery of divine self-existence. The word also appears in the formula 'blessed is the one who...' throughout the Psalms and Wisdom literature, framing covenant blessing.