'Smooth' in the Bible

And Jacob said to Rebekah his mother, Behold, Esau my brother is a hairy man, and I am a smooth man:

And she put the skins of the kids of the goats upon his hands, and upon the smooth of his neck:

And he took his staff in his hand, and chose him five smooth stones out of the brook, and put them in a shepherd's bag which he had, even in a scrip; and his sling was in his hand: and he drew near to the Philistine.

Which say to the seers, See not; and to the prophets, Prophesy not unto us right things, speak unto us smooth things, prophesy deceits:

Among the smooth stones of the stream is thy portion; they, they are thy lot: even to them hast thou poured a drink offering, thou hast offered a meat offering. Should I receive comfort in these?

Every valley shall be filled, and every mountain and hill shall be brought low; and the crooked shall be made straight, and the rough ways shall be made smooth;