-ieren

• -iren (obsolete)

From Middle High German -ieren, extracted by rebracketing of verbs borrowed from (Old) French, such as parlieren (Old French parlier + -en), or Italian, such as spazieren (Italian spaziare + -en).

• IPA^(key): /iːrən/, [iːʁən], [iːrən], [iː.ɐn], [iɐ̯n]
• Rhymes: -iːʁən

-ieren

1. Verb suffix: it and its inflected forms are found mainly as a rendering of French, Italian, and Latin suffixes like -ire and -iare in borrowings, but it is also sometimes applied with a factitive meaning to German stems.

   ‎Möbel (“furniture”) + ‎-ieren → ‎möblieren (“to furnish”)

   ‎Zentrum (“centre”) + ‎-ieren → ‎zentrieren (“to centre”)

   ‎halb (“half”) + ‎-ieren → ‎halbieren (“to halve”)

   ‎Buchstabe (“letter”) + ‎-ieren → ‎buchstabieren (“to spell”)

• Serbo-Croatian: -irati

From Old French -ier.

-ieren

1. used in verbs, indicating the action of doing something related to the first part of the word