What does "unmeltable" mean?

Not capable of being melted; not meltable.

What is a synonym for "unmeltable"?

Common synonyms include: nonfusible.

adj

adj ·Rare ·Advanced level

Adjective

1
Not capable of being melted; not meltable. not-comparable
"What we need to invent is unmeltable ice-cream."

"What we need to invent is unmeltable ice-cream."

From un- + meltable.