irréductible signifie anglais

irreducible▼◼◼◼((mathematics, of an integer) unable to be factored into smaller integers)
adjective
[UK: ˌɪ.rɪ.ˈdjuː.səb.l̩] [US: ˌɪ.rɪ.ˈdjuː.səb.l̩]

diehard▼◼◼◻(unreasonably resisting change)
adjective
[UK: ˈdaɪ.hɑːd] [US: ˈdaɪ.ˌhɑːrd]

implacable▼◼◻◻(impossible to prevent or stop, see also: inexorable; unstoppable)
adjective
[UK: ɪm.ˈplæk.əb.l̩] [US: ˌɪm.ˈplæk.əb.l̩]

indomitable▼◼◼◻(incapable of being subdued, overcome, or vanquished)
adjective
[UK: ɪn.ˈdɒ.mɪ.təb.l̩] [US: ˌɪn.ˈdɑː.mə.təb.l̩]One village of indomitable Gauls still resists the invaders. = Un village peuplé d'irréductibles Gaulois résiste encore et toujours à l'envahisseur.