-tiu

== Old Irish == === Etymology 1 === From Proto-Celtic *-tiyū; compare Latin -tiō. ==== Alternative forms ==== -thiu, -tu ==== Suffix ==== -tiu f forms verbal nouns ===== Declension ===== ===== Derived terms ===== ==== Further reading ==== Thurneysen, Rudolf (1940) [1909], D. A. Binchy and Osborn Bergin, transl., A Grammar of Old Irish, Dublin Institute for Advanced Studies, translation of Handbuch des Alt-Irischen (in German), →ISBN, § 730, page 451; reprinted 2017 === Etymology 2 === ==== Suffix ==== -tiu m alternative form of -tu (“-ness, -ity”) ===== Declension =====