-logy

Etymology
The English -logy suffix originates with loanwords from the Greek, usually via Latin and French, where the suffix is an integral part of the word loaned. E.g. from, since the 16th century.

The is a continuation of, ultimately from. Within Greek, the suffix is an abstract from, itself a verbal noun from.

Within English, the suffix becomes productive, especially to form names of sciences or departments of study, analogous to names of disciplines loaned from the Latin, such as from  or  from. Original compositions of terms with no precedent in Greek or Latin become common beginning in the later 18th century, sometimes imitating French or German templates (e.g., attested 1766, after French ; , attested 1801, after German ).

In a third stage, from the 19th century, the suffix becomes productive enough to form nonce combinations with English terms with no Greek or Latin origin, such as (1820),  (1837).

Finally, from the second half of the 19th century, the suffix has also been used as a simplex as (plural ologies) and  (plural logies), in parallel with and often alongside  (plural isms).

Suffix

 * 1) A branch of learning; a study of a particular subject.
 * Examples: biology, geology, genealogy
 * 1) Speech, or a way of speaking, a narrative, logical discourse.
 * Examples: haplology, eulogy, trilogy, apology

Usage notes
The form is also used when including the connecting vowel  that is commonly used in connecting two elements of Greek origin.

Translations

 * Afrikaans: -logie
 * Albanian: -logji
 * Alemannic German: -logie
 * Ancient Greek: -λογία
 * Arabic: لوجيا,
 * Aragonese: -lochía
 * Armenian: -լոգիա
 * Asturian: -loxía
 * Azerbaijani: -şünaslıq, -logiya
 * Basque:
 * Belarusian: -ло́гія
 * Breton: -loji
 * Bulgarian: -ло́гия
 * Catalan:
 * Cebuano: -lohia
 * Chinese:
 * Cantonese:
 * Mandarin:
 * Corsican: -lugia
 * Czech: -logie
 * Danish:
 * Dutch:, -kunde, -leer
 * Erzya: -тона
 * Esperanto: -logio
 * Estonian:
 * Faroese: -frøði
 * Finnish: ,
 * French:
 * Friulian: -logjie
 * Galician:
 * Georgian:
 * German:, , , ,
 * Greek:
 * Guaraní: -kuaaty, -kuaa
 * Haitian Creole: -loji
 * Hebrew:
 * Hindi:
 * Hungarian: -lógia, -ászat, -észet, ,
 * Icelandic: -fræði
 * Ido: -logio
 * Indonesian: -logi
 * Interlingua: -logia
 * Irish: eolaíocht
 * Italian:
 * Japanese:, ロジー
 * Kazakh: -тану, -логия
 * Khmer:, សាស្ត្រ
 * Korean:
 * Kurdish:
 * Northern Kurdish:
 * Kyrgyz: -логия
 * Lao: ວິທະຍາ, ສາດ
 * Latin: -logia
 * Latvian: -logija
 * Lithuanian: -logija
 * Low German: -logie
 * Luxembourgish: -logie
 * Macedonian: -логија
 * Malay:, kaji
 * Maltese: -loġija
 * Mongolian:
 * Moroccan Amazigh: ⵜⴰⵙⵏ-, ⵜⵓⵙⵏ-
 * Navajo: naalkaah
 * Northern Sami: -logiija
 * Norwegian:
 * Bokmål:
 * Nynorsk: -logi
 * Occitan: -logia
 * Old English: -cræft
 * Persian: ,
 * Polish:
 * Portuguese:
 * Romanian: -logie
 * Cyrillic: -лоӂие
 * Russian:, ,
 * Sardinian: -logia
 * Serbo-Croatian:
 * Cyrillic: -ло̀гија
 * Roman: -lògija
 * Sicilian:
 * Slovak: -lógia
 * Slovene: -logija
 * Spanish:
 * Sundanese: -logi
 * Swedish:
 * Tagalog: -lohia, -lohiya
 * Tajik: -шиносӣ
 * Tamil: -இயல்
 * Thai: ,
 * Turkish:
 * Turkmen: -logiýa
 * Ukrainian: -ло́гія
 * Urdu: یات
 * Uyghur: ـشۇناسلىق
 * Uzbek: -shunoslik, -logiya
 * Vietnamese:
 * Walloon:
 * Welsh:, -leg
 * Yiddish: ־לאָגיע
 * Zazaki: -loci


 * German: -teiler
 * Norwegian:
 * Bokmål:


 * Irish: