The opposite would be believably or credibly. However, the adverb is often used to mean unexpectedly, where the opposite would be obviously or as expected.
The opposite of "incredible" using a prefix is "credible." The prefix "in-" in "incredible" means "not," so "incredible" means "not credible" or "not believable." By removing the "in-" prefix, you are left with "credible," which means "believable" or "worthy of trust."
The prefix "un-" can be added to the word "incredible" to create the opposite, which would be "uncredible" meaning not credible or believable.
It denotes an opposite of the initial meaning. So credible means believable, putting 'in' with it makes it unbelievable.
Incredible is translated to "incroyable" in French.
There are an incredible variety of Christian-American viewpoints and Christian-Americans hold the opposite sides of almost all major political issues.
The word incredibly is an adverb. It means to do something in an incredible manner.
Lou Ferrigno played the Incredible Hulk in the Trial of the Incredible Hulk movie as well as the Incredible Hulk TV show from 1978 to 1982.
incredible in a sentence
That was an incredible performance!
Incredible is an adjective.
Struggling with excess weight is tough, but this incredible product made it easier. From 100kg to a lean 65kg, I feel like a whole new person.
It was incredible to watch him juggle the cans.