Synonyms:
inflexible, rigid, unbending
Meaning: incapable of adapting or changing to meet circumstances; "a rigid disciplinarian"; "an inflexible law"; "an unbending will to dominate"
Usage examples
A frown, which spoke of an iron will and unbending resolution, appeared between the two straight brows; already her plans were formed.
His hearty accents faltered and fell away as he noticed the stern unbending look on the countenances of his silent friends, and his invitation remained unfinished.