to be an opportune time and congruous (see Molina)
Orthographic Variants:
yeuelipan
Alonso de Molina:
yeuelipan. ser ya tiempo oportuno y congruo. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 36r. col. 2. Thanks to Joe Campbell for providing the transcription.