The word "immerser" is a noun form of the verb "immerse", which means to submerge something completely in a liquid. According to the International Phonetic Alphabet (IPA), the spelling of "immerser" is /ɪməːsə(r)/. The first syllable "im" is pronounced as "ihm," the second syllable "mer" is pronounced as "muhr," and the last syllable "-er" is pronounced as "uh(r)." By breaking down the word into its individual phonetic sounds, we can better understand how to correctly pronounce and spell this word.