bubble (v.) Look up bubble at Dictionary.com
mid-15c., perhaps from bubble (n.) and/or from Middle Low German bubbeln (v.), probably of echoic origin. Related: Bubbled; bubbling.
bubble (n.) Look up bubble at Dictionary.com
early 14c., perhaps from Middle Dutch bobbel (n.) and/or Middle Low German bubbeln (v.), all probably of echoic origin. Bubble bath first recorded 1949. Of financial schemes originally in South Sea Bubble (1590s), on notion of "fragile and insubstantial."