midnessEtymologySynchronically, by surface analysis, mid + -ness; diachronically, known to have an equivalent etymon in Old English and probably never absent from the language since then, albeit rare.midness means The state or quality of being mid. Lexicurio rates it Sui generis — a strength score of 88 out of 100.nounThe state or quality of being mid.“Rule (11) formulates that short, non-high vowels that agree in backness, roundness and midness (/a/: [- mid, - back, - round]; 10/: [+ mid, + back, + round]) are lengthened before voiceless fricatives.”