* re - This part has a short "e" sound, similar to the "e" in "bed."
* si - This part has a long "i" sound, similar to the "i" in "bike."
* dent - This part has a short "e" sound, similar to the "e" in "ten."
So, while "resident" does have a short vowel sound in the "re" and "dent" parts, it also has a long vowel sound in the "si" part.