sightliness

From sightly +‎ -ness.

sightliness (uncountable)

1. The state or condition of being sightly; attractiveness, beauty.
   • 1748, [Samuel Richardson], “Letter XLI”, in Clarissa. Or, The History of a Young Lady: […], volume (please specify |volume=I to VII), London: […] S[amuel] Richardson;  […], →OCLC:

     Your sightliness of person may perhaps make some think this alliance disparaging.

• insightless