the word 'tempered' originates from the latin verb 'temperare', which meant to mix, combine, or regulate in due proportion. this concept of achieving a balanced mixture was applied in medieval english to the mind or disposition, leading to the sense of 'temper' as one's state of mind. the metallurgical sense, referring to the process of heating and cooling metal to achieve optimal hardness and resilience, directly extends the original latin idea of bringing something to a proper or desired condition through regulated treatment. thus, whether describing a person's mood or the strength of steel, 'tempered' conveys the notion of having been brought to a specific, often improved, state through a moderating process.

Structure: temper + ed temper (from latin 'temperare', meaning to mix, regulate, moderate; verb root) + ed (from old english '-ed', '-od', '-ad', past participle suffix forming adjectives)