Taoiseach.
Head of the Irish government, comparable to a UK or Australian Prime Minister.
Meaning & usage
Head of the Irish government, comparable to a UK or Australian Prime Minister.
Title of the person holding that office.
Where this word comes from
From Old Irish toísech (“leader”), from Primitive Irish ᚈᚑᚃᚔᚄᚐᚉᚔ (tovisaci, genitive), from Proto-Celtic *towissākos (“chief, first, primary”, adjective) (compare Welsh tywysog (“prince”)), from *towissus (“act of leading, leadership; beginning”) (from *to- (prefix meaning ‘to; towards’) + *wissus (“act of discovering or finding out; knowledge”) (ultimately from either Proto-Indo-European *wedʰ- (“to lead”) or *weyd- (“to know; to see”))) + *-ākos (suffix forming adjectives with the sense ‘belonging to, having; involved with’).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.