Archaic third-person singular present tense of 'follow'; he, she, or it follows.
From Middle English 'folwen' with the archaic third-person singular ending '-eth' (also written '-th'). This ending was standard in Early Modern English but is now obsolete.
This suffix '-eth' (as in 'he goeth,' 'she cometh') disappeared from English around the 1700s, but it's why we still recognize the King James Bible as sounding ancient even though many people spoke this way only 400 years ago.
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