English
imperspicuity
From im- + perspicuity.
Formed from in- + perspicuity
Proto-Indo-European *speḱ- ‘to see, to look, to observe’
Latin perspic(iō)
Latin perspicuus ‘clear”, “transparent”’
Late Latin perspicuitās ‘evidentness”, “self-evidency’
English perspicuity
Today it means
noun vagueness; lack of clarity
Language periods are conventional ranges, not dates for this word.
Etymograph / imperspicuity