Principal English Translation: 

to skirmish, or fight; to fight against others; to fight one against the others, or skirmish (see Molina)

Alonso de Molina: 

icali. nin. (pret. oninical.) escaramuzar, o batallar.
icali. nite. (pret. oniteical.) pelear contra otros.
icali. titi. (pret. otiticalque.) pelear vnos con otros, o escaramuzar.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 31v. col. 2. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

(I)HCAL(I) vreft,vt to engage in skirmishing; to contest with someone / escaramuzar o batallar (M), pelear contra otros (M), pelear unos con otros o escaramuzar (M) (I)HCALIĀ applic. (I)HCAL(I) (I)HCALĪHUA altern. nonact. (I)HCAL(I) (I)HCALĪLŌ altern. nonact. (I)HCAL(I)
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 96.

Attestations from sources in English: 

icali = to war, to fight
Daniel Garrison Brinton, Ancient Nahuatl Poetry: Containing the Nahuatl Text of XXVII Ancient Mexican Poems (1887), 155.