Elision is when a letter completely vanishes from a word. In Greek, an elision is marked by an apostrophe.
Quiesce, Elide, and Assimilate
Went out for a stroll about half past eight.
Quiesce was seen, but never heard.
Elide disappeared without a word.
Whatever happened to assimilate?
A footprint dagesh points to his fate.
cf. assimilate, quiesce.