A fool multiplies words, though no man knows what is to be, and who can tell him what will be after him?
Solomon, having shown the benefit of wisdom, and of what great advantage it is to us in the management of our affairs, here shows the mischief of folly and how it exposes men, which perhaps comes in as a reflection upon those rulers who set folly in great dignity. I.
Commenting on Ecclesiastes 10:12-15
A fool also is full of words,.... Or, "multiplies words" (y). Is very talkative, says the same thing over and over again; uses an abundance of waste words, that have no meaning in them; utters every thing that comes uppermost, without any order or judgment; affects to talk on every subject, whether he knows anything of it or not; and will engross all the conversation...
full of words-- (Ecc 5:2). a man cannot tell what shall be-- (Ecc 3:22; Ecc 6:12; Ecc 8:7; Ecc 11:2; Pro 27:1). If man, universally (including the wise man), cannot foresee the future, much less can the fool; his "many words" are therefore futile.