Nonreactive
What it means
Meaning 1
Able to receive provocation or stress without answering through immediate impulse.
Reach for it when praising emotional steadiness when a pause allows a deliberate response
Her nonreactive manner gave everyone time to separate the facts from the accusation.
Meaning 2
Not readily undergoing a chemical or physical reaction in the stated conditions.
Reach for it when describing material compatibility or stability in a technical setting
The sample remained nonreactive when exposed to the storage gas.