One of my favorite words to say is â€œindubitably.â€ Go on, say it! Isnâ€™t it great the way it rolls off your tongue? But I thought that indubitable was one of the words like inept where the root is not a word, i.e. He is really ept with a hammer. I was wrong. There is a root word.
Dubitable -Subject to doubt or question; uncertain. (dictionary.com)