Inflexible (en. Inflexible)
[ɛ̃.fle.k.si.bl]
Slang Meanings
To have a steel-like attitude.
He has a steel-like attitude when it comes to rules.
Il a une attitude de fer quand il s'agit des règles.
To be like concrete.
His decision is like concrete, impossible to change.
Sa décision est comme du béton, impossible à changer.