in- an inseparable particle
cf. Gr. ἀ-, ἀν-; Germ. and Eng. un-, which, prefixed to an adj., negatives or reverses the meaning: impar, unequal : intolerabilis, unbearable : immitis, ruthless . —In tmesis: Hanc . . . Inque salutatam linquo, V.In composition 2 in- has the same forms as the praep . 1 in, but loses the n before gn- .