infrangible
adjective
in·fran·gi·ble (ˌ)in-ˈfran-jə-bəl 
1
: not capable of being broken or separated into parts
infrangible iron bars
2
: not to be infringed or violated
infrangible laws
infrangibility
(ˌ)in-ˌfran-jə-ˈbi-lə-tē
noun infrangibly
(ˌ)in-ˈfran-jə-blē
adverb 
Did you know?
Infrangible comes to us via Middle French from the Late Latin infrangibilis and is ultimately derived from the prefix in- and the Latin verb frangere, meaning "to break." (Believe it or not, our "break" is ultimately derived from the same ancient word that gave rise to "frangere.") "Infrangible" first appeared in print in English in the 16th century with the literal meaning "impossible to break"; it was later extended metaphorically to things that cannot or should not be broken.
Word History
Etymology
Middle French, from Late Latin infrangibilis, from Latin in- + frangere to break — more at break
First Known Use
1597, in the meaning defined at sense 1
infrangible
adjective
as in irrefragable
Synonyms & Similar Words
Relevance
- irrefragable
- unbreakable
- dependable
- durable
- reliable
- solid
- sturdy
- beefy
- stable
- sound
- strong
- cohesive
- firm
- stalwart
- bombproof
- fast
- tough
Antonyms & Near Antonyms
- unstable
- unsound
- unsteady
- rickety
- weak
- shaky
- infirm
- wobbly
- insecure
- unsubstantial
- unbalanced
- wabbly
- tottery
- tottering