infusible
Resists becoming liquid
Infusible describes something that cannot be melted or fused, even at high temperatures: infusible ceramic materials.
The word also has a rarer, opposite meaning: capable of being infused or poured in.
Context usually clarifies which sense applies—the "cannot melt" meaning dominates in technical and scientific usage.
Resistant to heat/control
- heatproofUnaffected by high temperatures
- fireproofUnable to ignite
- incombustibleUnable to catch fire
- flame-retardantInhibits ignition and burning
fire-resistant · high-temperature · tungsten · molybdenum · iridium · platinum · ceramics · silica
Unable to exist together
- immiscibleCannot be blended
- unmixableCannot be combined
- insolubleCannot be dissolved
- nonreactiveChemically inactive substance
unassimilable · separable · distinct · resistant · unintegrated
Unable to bend
- unyieldingRefusing to give way
- hardenedMade tough or unfeeling
- solidifiedMade firm, not fluid
- setArrange in position
crystallized · vitrified · indurated · petrified · calcified · ossified · cemented · consolidated
Impossible to modify
- unalterableIncapable of being changed
- immutableIncapable of being changed
- fixedRestored or immovable
- irreversibleCannot be undone
lasting · durable · enduring · stable · persistent · constant · invariable · indelible
refractory
Resistant to heat/control
- heatproofUnaffected by high temperatures
- fireproofUnable to ignite
- incombustibleUnable to catch fire
flame-retardant · fire-resistant · high-temperature · tungsten · molybdenum · iridium · platinum · ceramics · silica · zirconium
incompatible
Unable to exist together
- immiscibleCannot be blended
- unmixableCannot be combined
- insolubleCannot be dissolved
nonreactive · unassimilable · separable · distinct · resistant · unintegrated
inflexible
Unable to bend
- unyieldingRefusing to give way
- hardenedMade tough or unfeeling
- solidifiedMade firm, not fluid
set · crystallized · vitrified · indurated · petrified · calcified · ossified · cemented · consolidated · fused
unchangeable
Impossible to modify
- unalterableIncapable of being changed
- immutableIncapable of being changed
- fixedRestored or immovable
irreversible · lasting · durable · enduring · stable · persistent · constant · invariable · indelible · indestructible
infusiblefusible
Able to be melted
meltable · liquefiable · thermoplastic · low-melting · fluid
confuse, fuse, fusion, infuse, diffuse, profuse, infusion, effusive, diffusion