This dash can be placed between two | characters, for example |-|.
When || is typed, the default intra word dash is used, which is <context>||</context>.
The || is also used in word combinations like (intra)word, which is typed as (intra|)|word.
The mechanism is not foolproof but it serves most purposes. In case the hyphenation is
incorrect you can hyphenate the first word of the composed one by hand: (in\-tra|)|word.
The main reason behind this mechanism is that TeX doesn’t really know how to hyphenate
\VL \ShowComposed intra|=|word \VL\LR
\VL \ShowComposed intra|'|word \VL\LR
\VL \ShowComposed |<|subsentence|>| \VL\LR