inflexible (ironclad, material, behavior)

eisern (a) (ironclad)

streng (a) (ironclad)

unbiegsam (a) (material)

unbeugsam (a) (behavior)

unnachgiebig (a) (behavior)

à toute épreuve (a) (ironclad)

dur (a) [m.] (behavior)

rigide (a) (ironclad)

rigide (a) (material)

inflexible (a) (ironclad)

inflexible (a) (behavior)

intransigeant (a) [m.] (behavior)

non flexible (a) (material)

duro (a) (behavior)

fermo (a) (behavior)

rigido (a) (ironclad)

rigido (a) (material)

ferreo (a) (ironclad)

inflessibile (a) (ironclad)

inflessibile (a) (material)

inflessibile (a) (behavior)

inviolabile (a) (ironclad)

obstinado (a) (behavior)

rígido (a) (ironclad)

rígido (a) (material)

riguroso (a) (ironclad)

inflexible (a) (ironclad)

inflexible (a) (material)

inflexible (a) (behavior)

inexorable (a) (behavior)

inquebrantable (a) (behavior)

hard (a) (ironclad)

streng (a) [m.] (ironclad)

waterdicht (a) (ironclad)

onbuigzaam (a) (ironclad)

onbuigzaam (a) (material)

onbuigzaam (a) (behavior)

bikkelhard (a) (behavior)

keihard (a) (behavior)

onvermurwbaar (a) (behavior)

onbuigbaar (a) (material)

orubblig (a) (ironclad)

orubblig (a) (behavior)

sträng (a) (ironclad)

rigorös (a) (ironclad)

obeveklig (a) (behavior)

oböjlig (a) (material)

benhård (a) (behavior)

duro (a) [m.] (ironclad)

duro (a) [m.] (behavior)

rígido (a) (ironclad)

rígido (a) (material)

inflexível (a) (ironclad)

inflexível (a) (material)

inflexível (a) (behavior)

adamantino (a) (behavior)

inexorável (a) (behavior)