1. in a way that cannot be altered or modified; permanently

Examples

• The laws of physics remain unchangeably constant throughout the universe.
• Her loyalty to her family was unchangeably strong.
• The mountain stood unchangeably against the horizon for centuries.
• His principles were unchangeably rooted in his upbringing.
• The contract terms were unchangeably fixed once signed.
• She believed unchangeably in the power of education.