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Webster's Dictionary (GCIDE)
Note: Both the form and the name of the letter S are derived from the Latin, which got the letter through the Greek from the Phoenician. The ultimate origin is Egyptian. S is etymologically most nearly related to c, z, t, and r; as, in ice, OE. is; E. hence, OE. hennes; E. rase, raze; erase, razor; that, G. das; E. reason, F. raison, L. ratio; E. was, were; chair, chaise (see C, Z, T, and R.). [1913 Webster]
1.[OE. es, AS. as.] The suffix used to form the plural of most words; as in roads, elfs, sides, accounts. [1913 Webster]
2.[OE. -s, for older -th, AS. -[eth].] The suffix used to form the third person singular indicative of English verbs; as in falls, tells, sends. [1913 Webster]
3.An adverbial suffix; as in towards, needs, always, -- originally the genitive, possesive, ending. See -'s. [1913 Webster]
What does it mean? Question 1 of today’s quiz