Of or containing iron.
Of compounds of iron in which it has a valence or oxidation number of 2.
Of an individual or skeletal element: strongly built; muscular; not gracile.
Sensible (of intellect etc.); straightforward, not given to or confused by uncertainty or subtlety.
Designed or evolved in such a way as to be resistant to total failure despite partial damage.
Not greatly influenced by errors in assumptions about the distribution of sample errors.
Resistant or impervious to failure regardless of user input or unexpected conditions.
Requiring strength or vigor.
Violent; rough; rude.
Evincing strength and health; strong; (often, especially) both large and healthy.