Suffix ology in FuhneHTik IngLish Iz Suffix-OLLuhdjee Uv SyzOhmOLLuhdjee.

Etymology

-o- (“(interconsonantal)”) + -logy.

-logy Prohnuhnseeaishuhn:
enPR: ləjē, IPA(key): /ləd͡ʒi/

[ETymoLogy Sv Suffix -ology]

word-forming element indicating "branch of knowledge, science," now the usual form of -logy. Originally used c. 1800 in nonce formations (commonsensology, etc.), it gained legitimacy by influence of the proper formation in geology, mythology, etc., where the -o- is a stem vowel in the previous element.

[etymonline.com/word/-logy OhfishuL ETymoLogy uv-logy]

word-forming element meaning "a speaking, discourse, treatise, doctrine, theory, science," from Greek -logia (often via French -logie or Medieval Latin -logia), from root of legein "to speak;" thus, "the character or deportment of one who speaks or treats of (a certain subject);" from PIE root *leg- (1) "to collect, gather," with derivatives meaning "to speak (to 'pick out words')." Often via Medieval Latin -logia, French -logie.