its equal (see Molina), or something that squares with something else; its mate; his or her spouse
Orthographic Variants:
ynamic
Alonso de Molina:
Inamic. su ygual, o cosa que viene bien y quadra con otra. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, f. 38v.