xelhuia.

Headword: 
xelhuia.
Principal English Translation: 

to divide something with someone, to relieve someone by taking part of the burden (see Karttunen and Molina)

IPAspelling: 
ʃelwiɑː
Alonso de Molina: 

xelhuia. nitetla. (pret. onitetlaxelhui.) partir con otro alguna cosa, o aliuiar quitando parte dela carga o del tributo.
xelhuia. nic. (pret. onictlaxelhui.) lo mesmo es que tlatzontlaxilia.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 158v. col. 2. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

XELHUIĀ vt to divide something with someone, to relieve someone by taking part of his burden / partir con otro alguna cosa, o aliviar quitando parte de la carga o del tributo (M) applic. XELOĀ.

XILHUIĀ See XELHUIĀ.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 322.