enquiry vs inquiry

enquiry or inquiry:[79] According to Fowler, inquiry should be used in relation to a formal inquest, and enquiry to the act of questioning. Many (though not all) British writers maintain this distinction; the OED, on the other hand, lists inquiry and enquiry as equal alternatives, in that order. Some British dictionaries, such as Chambers 21st Century Dictionary [4], present the two spellings as interchangeable variants in the general sense, but prefer inquiry for the "formal inquest" sense. In the US, only inquiry is commonly used. In Australia, inquiry and enquiry are often interchangeable, but inquiry prevails in writing. Both are current in Canada, where enquiry is often associated with scholarly or intellectual research.

根據本人對以上文字的理解, inquiry 是比較正規的, 有禮貌的, 多用於文章, 書寫中, 而enquiry (在加拿大) 則多與學術研究有關的項目上.
簡而言之, 兩者意思一樣, 都是名詞, 只是前者較有禮貌, 例句建議查看 Dr.eye

謝謝