The word "ear-popping" refers to the sensation that occurs when one's ears suddenly pop or become pressurized, often as a result of changes in altitude or air pressure. Antonyms for this term might include comfortable, soothing, or relaxing, all of which indicate a lack of discomfort in the ears. Other antonyms could include dull, muted, or quiet, as these words suggest a lack of sensation or intensity in the ears. Overall, the antonyms for "ear-popping" are words that convey a sense of ease, calmness, and tranquility in contrast to the sudden and unsettling sensation of ear pressure.