append

Generally used in programming terms. Means to add something to a string or variable.

Append " dictionary" to "urban".

PHP Example:
<?php
$var = "Urban";
/* append to var */
$var .= " Dictionary";
?>

appendicitis

An agonising, unwelcome, erect, inflamed penis causing havoc inside your body.

Though normally flaccid, Tom's appendix throbbed vigorously causing appendicitis.