'Smoothly' in the Bible

This same Hezekiah blocked the outlet of the water of the Upper Gihon and channeled it smoothly downward and westward to the city of David. Hezekiah succeeded in everything he did.

Don’t gaze at wine because it is red,when it gleams in the cupand goes down smoothly.

Your mouth is like fine wine—W flowing smoothly for my love,gliding past my lips and teeth!