In Spanish, the pronunciation would be "see-REE-ah-ko" ("c" can be pronounced in three different ways, but just for the sake of simplicity let's stick to the most common "hissing", OK?).
Italian pronunciation:Chee-Ree-Ahk-OhA "C" before an "I" creates "Chee," (ci), the "I" stressed. Roll your "R" for "I," and once again stress your "I." "A" is spoken as in "Father." "C" equals a hard "K," if it is before "O." "O" is as usual, "Oh." [noted -ed]