unperceivable
/ʌnpərˈsivəbəl/
adjective
- Not able to be seen, heard, felt, or noticed; impossible to perceive.
- The changes in the painting's color over time were so gradual they were almost unperceivable.
- To the naked eye, the movement of the clock's hour hand is unperceivable.
- The difference in temperature was unperceivable without a thermometer.
Antonyms