Other than simple words (beer, career, cheer, deer, leer, queer, and sheer), the suffix form -eer is usually applied to persons (or their actions in the case of the verb "commandeer"). The root nouns or verbs establish the activity or locale for the individuals involved, e.g. "gazetteer", "mutineer" and "mountaineer". More esoteric is the science-fiction neologism "rocketeer".
Reindeer
Cash-eer-ing
Estimated Energy Requirement
According to the dictionary it is eer-os or er-os.
About 1600: (as a noun with military reference): from French volontaire 'voluntary', from Latin voluntarius"voluntary, of one's free will". The change in the ending was due to association with -EER.
Reindeer
It is on the last syllable ("-eer").
heets-eer (הצעיר)
pioneer
sah-EER (שעיר)
There are two: eer -ie
Words that have the letters -eer in them are deer, beer, and cheer. Other words that have the letters -eer in them are auctioneer and career.
Irlandese in the singular and irlandesi in the plural are Italian equivalents of the English word "Irish." Context makes clear which form suits. The respective pronunciations will be "EER-lan-DEY-zey" in the singular and "EER-lan-DEY-zee" in the plural in Italian.
en-gine would be the answer!
engineer
eer
Used in texts, "eer" means ever erring which implies ever making mistakes.