What does the term "impassive" imply about a person's emotional state?

The term "impassive" refers to a state of being that is characterized by a lack of emotional expression. When someone is described as impassive, it suggests that they do not exhibit the typical responses one might expect in emotional situations; they remain calm, composed, and unaffected, thereby showing little to no emotion on their face or through their body language. This term is often used in contexts where emotional restraint or stoicism is observed, implying a deliberate or inherent detachment from expressing feelings. The other choices, which infer happiness, emotional revelation, or expressiveness, do not align with the meaning of impassive, which fundamentally denotes an absence of overt emotional display.