13-letter words containing f, a, i, n, g, u
- unfalteringly — to hesitate or waver in action, purpose, intent, etc.; give way: Her courage did not falter at the prospect of hardship.
- unfascinating — of great interest or attraction; enchanting; charming; captivating: a fascinating story; fascinating jewelry.
- uniflagellate — having only one flagellum.
- unsignificant — important; of consequence.