\accent number character
A TeX primitive command used to generate accented characters from accent marks and letters. The accent mark is selected by number, a numeric argument, followed by a space and then a character argument constructs the accented character in the current font.
These are accented ‘e’ characters.
\accent18 e \accent20 e \accent21 e \accent22 e \accent23 e
The first is a grave, the second is breve, etc.
The position of the accent is determined by the font designer and so the
\accent use may differ between fonts. In LaTeX it is
desirable to have glyphs for accented characters rather than building
\accent. Using glyphs that already contain the
accented characters (as in T1 encoding) allows correct hyphenation
\accent disables hyphenation (specifically with OT1 font
encoding where accented glyphs are absent).
There can be an optional font change between number and
character. Note also that that this command sets the
\spacefactor to 1000 (voir \spacefactor).
An unavoidable characteristic of some Cyrillic letters and
the majority of accented Cyrillic letters is that they must be
assembled from multiple elements (accents, modifiers, etc.) while
\accent provides for a single accent mark and a single letter
combination. There are also cases where accents must appear between
letters that \accent does not support. Still other cases exist where
the letters I and J have dots above their lowercase counterparts that
conflict with dotted accent marks. The use of
\accent in these
cases will not work as it cannot analyze upper/lower case.