Un impressible, meaning not easily impressed or influenced, is a term that is often associated with a lack of responsiveness or openness. Antonyms for un impressible would include words such as impressionable, responsive, susceptible, and receptive. Individuals who are impressionable are easily influenced and often considered to be open-minded. Responsive individuals are quick to react or respond to something, indicating an attentive and alert nature. Someone who is susceptible is easily influenced or affected by something or someone, displaying a degree of sensitivity. Receptive individuals are open to new ideas or information and willing to listen and understand. These antonyms have opposite meanings to un impressible, highlighting a contrasting range of characteristics and traits.