† infenciˈbilityObs.rare. [f. in-3 + fencible + -ity.] The condition of not being ‘fencible’; unfitness for defensive military service. 1652Urquhart JewelWks. (1834) 252 Then were these very same men whom they had formerly cast, either for malignancy or infencibility, inrolled in their troups.