[int_19h]

At least that's often spelled "fo'c'sle" these days, which gives you a good idea of the actual pronunciation.

My personal favorite in English is "colonel" being pronounced the same as "kernel". Which is insane even from an etymological perspective because the word is a derivative of "column" (as in, a colonel is someone who commands/leads a column of soldiers).

[lelandfe]

Yes, an incredibly rare use of double apostrophes in English! More uncommonly you'll see bo's'n as well, for boatswain.