-ologio

Derived from Ancient Greek -λογία (-logía, “-logy, branch of study, to speak”).

• IPA^(key): [oloˈɡio]
• Rhymes: -io
• Hyphenation: o‧lo‧gi‧o

-ologio

1. denotes the field of the specialist in the root.

   ‎Esperanto (“Esperanto”) + ‎-ologio → ‎esperantologio (“Esperantology”)

   ‎psiko (“psyche”) + ‎-ologio → ‎psikologio (“psychology”)

   ‎socio (“society”) + ‎-ologio → ‎sociologio (“sociology”)

   ‎zoo (“zoo”) + ‎-ologio → ‎zoologio (“zoology”)

Words ending in -ologio appear in scientific terminology that cannot be reduced further, such as biologio, ekologio, geologio, topologio, etc.

• -io
• -iko