unwaveringly(WITHOUT CHANGING)
They were unshakeably opposed to war.
Teachers and parents are unshakeably optimistic about the vast majority of children being able to master the curriculum.
These are extremely successful politicians who are unshakeably focused on holding onto power.
Just one year ago, support for the president appeared unshakeably solid.
He knew instantly and unshakeably that he wanted to become a writer.

SMART Vocabulary: related words and phrases

Having a powerful effect
blazing
compelling
compellingly
cumulative effect
devastating
devastatingly
fullness
high-impact
hyperintense
impactful
keen
life-altering
life-changing
scalding
super-real
take (something) over
tenaciously
unconquerable
unfailing
vivid