Yasaph means to add, increase, continue, or do again. It appears about 210 times. It expresses continuation, repetition, and increase. The name Joseph derives from this root.
God's ability to add and increase reflects His abundant generosity. He adds years to life, children to families, and blessing upon blessing. Rachel said 'May the LORD add to me another son' (Genesis 30:24). God's blessings are ever-increasing.