The phrase "without expression" refers to a lack of emotion or feeling being conveyed through one's facial expression or body language. Synonyms for this term include unemotional, impassive, blank, stoic, poker-faced, expressionless, and deadpan. These words indicate a lack of visible emotion or reaction to a situation or stimuli, such as maintaining a calm and collected demeanor in the face of stress or sadness. "Without expression" can also be described as neutral, detached, indifferent, or reserved, suggesting a deliberate choice to hide one's true emotions from others. These synonyms can be used interchangeably to convey the same meaning of lacking emotions or facial expressions.