stolidness
Stolidness is the quality or state of being stolid: having little or no apparent emotion or volatility; a steady, unshaken demeanor that does not easily express feelings. It can refer to people who remain calm under pressure, as well as to situations or landscapes that appear unmoved by events. The term often carries a negative connotation, implying dullness, insensitivity, or an unwillingness to engage emotionally, but it can also describe reliability and steadiness when emotional display is unnecessary.
Stolid derives from the Latin stolidus, meaning dull or stupid; the word entered English in the early
In literary usage, a stolid character is one who shows little outward emotion, which can be used