The term 'unforgiving' can be described by the crossword solutions of HARD (4 letters), CRUEL (5 letters), HARSH (5 letters), RIGID (5 letters), STERN (5 letters), and STRICT (6 letters). Unforgiving is an adjective that describes someone or something that is not willing to forgive, show mercy, or be lenient. It is often used to describe a person who is unwilling to forgive or forget a mistake or wrongdoing. Unforgiving people are often seen as being cold, unyielding, and inflexible. They may also be described as being HARSH, STRICT, and RIGID in their expectations and judgments.