English
impalpability
Formed as impalpable + -ity; compare the French impalpabilité.
Formed from impalpable + -ity
The story
Formed as impalpable + -ity; compare the French impalpabilité.
Today it means
noun Physical imperceptibility; incapability of being sensed by the tactual faculties.
Language periods are conventional ranges, not dates for this word.
Etymograph / impalpability