The plural of essentiality; multiple essential qualities, characteristics, or fundamental aspects of something.
From essentiality (the quality of being essential) plus -ies (plural suffix). Built from the Latin essentia through the Romance languages into modern English.
This word is rare in conversation, but philosophers love it when discussing what makes multiple different things all fall into the same category — like what essentialities do all languages share?
Complete word intelligence in one call. Free tier — 50 lookups/day.