dair

{{About|the letter}}

{{Use dmy dates|date=April 2022}}

{{Contains special characters|Ogham}}

{{Table Oghamletters}}

Dair is the Irish name of the seventh letter of the Ogham alphabet, ᚇ, meaning "oak". The {{langx|sga|dair}} (Early {{langx|sga|daur}}) is related to Welsh {{lang|cy|derw(en)}} and to Breton {{lang|br|derv(enn)}}. Its Proto-Indo-European root was *dóru ("tree"), possibly a deadjectival noun of *deru-, *drew- ("hard, firm, strong, solid"). Its phonetic value is [d].{{cite book | title=A Guide to Ogam | last= McManus |first = Damian | year = 1991 | series = Maynooth Monographs | volume =4 | isbn= 1-870684-75-3 | issn = 0790-8806 | publisher = An Sagart | location = Co. Kildare, Ireland |page =37 | quote= This letter name clearly corresponds to Old Irish dair/daur, gen. daro 'oak-tree', Welsh derw(en) 'oak-tree(s)' from the root *deru-, whence the value /d/.}}

Dair forms the basis of some first names in Irish Gaelic such as Daire, Dara, Darragh and Daragh.