fifteenness en · NOUN
Etymology
Etymology tree Proto-Indo-European *pénkʷe Proto-Germanic *fimf Proto-Indo-European *déḱm̥ Proto-Germanic *tehun Proto-Germanic *fimftehun Anglian Old English fīftīene Middle English fiftene English fifteen Proto-Germanic *-in- Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Indo-European *-h₂ti Proto-Germanic *-ōną Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English fifteenness From fifteen + -ness.
Meanings
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(uncountable) The property of being fifteen.
In short, the number fifteen cannot in any manner be separated from its fifteenness.
1986, Shahidullah Faridi, Inner aspects of faith:The fifteenness is unique to the icosahedron and probably valves the 15 great circles of the icosahedron.
1975, Richard Buckminster Fuller, E. J. Applewhite, Synergetics; explorations in the geometry of thinking, Volume 1: