English
smoothifier
From smooth + -ify + -er, a marketing coinage by Guinness.
Formed from smooth + -ify + -er
Today it means
noun A floating widget inside a beer can, which (unlike earlier fixed versions) prevents the contents from overflowing if opened when warm.
Sources
Sources: Wiktionary, “smoothifier”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / smoothifier