He sends out his word— He commands: or, he speaks.

And melts them— Melts the snow and the ice. Compare the notes at Job 37:10-…

He casteth forth his ice like morsels: who can stand before his cold? He sendeth out his word, and melteth them:

It is just as easy…

He sends out his word, and melts them
The snow, the hoar frost, and ice: this he does by a word of his, who can free…

The church, like Jerusalem of old, built up and preserved by the wisdom, power, and goodness of God, is exhorted to praise him for all the benefits…