ic.

Headword: 
ic.
Principal English Translation: 

in order that, in order to, so that; with, with it, by means of, for this reason, whence, for which reason; (sometimes a directional); when a question, in what time period? when did that happen? (see Molina)

Orthographic Variants: 
īc, yc
Alonso de Molina: 

Ic? en que tiempo? s. acaecio esso?
Ic. con. preposicion.
Ic. por esto, o por lo qual, portanto, o por esso. Conjunction y Aduerbio.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, f. 31v.

Frances Karttunen: 

ĪC. with, by means of, thereby / con (M), con, hacia, por, en (S). This often fuses with IN to form INĪC with the same sense. It is abundantly attested across sources, especially in C where, in keeping with C's practice of not marking the noncontrastive and the obvious, the vowel is marked long only half the time. See ĪCA.

Andrés de Olmos: 

Yc, yquin, quando
Andrés de Olmos, Arte para aprender la lengua Mexicana, ed. Rémi Siméon, facsimile edition ed. Miguel León-Portilla (Guadalajara: Edmundo Aviña Levy, 1972), 189.

See also: 
ica.
inic.