I saw a line in the English subtitles of a non-English show:
Stop playing. Go all out to fight me, or you will end up using up all of your labors.
I first went and made sure the subtitles were produced by an American company and supposedly by native speakers of American English. The exact meaning of labors here appears to be energy or power. Although the meaning of the sentence is apparent, I am having a hard time having this usage corroborated by dictionaries. I have checked M-W, Oxford Online, Macmillan, Cambridge, and Google Dictionaries for the plural usage of labor. Weirdly enough, many dictionaries don't have entries for a countable/plural noun usage of labor.
There is only one entry in Macmillan that includes labors, however, it also specifies that this usage is uncountable:
labor or labors [UNCOUNTABLE] FORMAL work that involves effort, especially physical effort
If Macmillan is correct, then should I say:
Hercules' labors is (or are) depicted in detail in the book.
Merriam Webster, on the other hand, doesn't have an entry for the plural labors, but there is one in Merriam Webster Kids Dictionary (lol) that defines labor as a task. However, these definitions (task and work, which are basically the same) don't match the usage at issue, which most likely means energy or power. Is the usage in my original question correct? Also is labors uncountable?