amacecistes is incorrectly written, and should be written as "you hear or you amanecisteis" being its meaning:
May be the 2nd person singular of the past perfect simple ( indefinite ) indicative of the verb dawn by suppressing the " s " final: tokuhama. This error is very common in the popular dictions, which is rare because it is more euphonious to hear that amanecistes. It could also be that you would say " amanecisteis " then still the 2nd person plural of the same time and mode. Although what dawn properly is the day, is also says improperly from people who are in a particular place at dawn