-st
Origin 1
Full definition of -st
Suffix
- (archaic) Verb suffix for the second-person singular
- MacbethThou com
' st to use thy tongue.
Origin 2
Suffix
- Marks ordinals written in digits when the final term of the spelled number is "first"the 21st century
Origin 3
-s + -t of excrescent suffixes, with -s sometimes genitive.
Suffix
- Excrescent suffix (adding sound but largely not changing the meaning).
Usage notes
When there is a shorter synonymous word (as in amongst/among), the form with -st is generally considered more formal, old-fashioned, affected, or British. However, against is distinct from again, and midst is used in some context distinctly from mid.