Unwavering means never faltering or losing steadiness. Holding the same line the whole way through.
It attaches to support, loyalty, belief and gaze: unwavering support, an unwavering commitment, an unwavering stare. The image behind it is a flame or a needle that does not flicker, and the verb waver means exactly that hesitation. It is nearly always a compliment, though it can imply stubbornness if the thing being held to is wrong. Steadfast and resolute are its close companions.
1adjectiveunwaveringSteady and never faltering.
“She had his unwavering support throughout.”
Proto-Indo-European
*webʰ-
English, today
unwavering
From un- + wavering.
Etymology from Wiktionary, CC BY-SA