In Irish it's "síocháin".
In Scottish Gaelic it is sìth
In Welsh it is heddwch (also tangnefedd)
There's actually no such language as "Celtic". Celtic refers to a group of dozens of languages, six of which are spoken today:BretonCornishIrish GaelicManxScottish GaelicWelsh
In Irish it's lúbra / cathair gríobhháin
go deo (Irish)am byth (Welsh)
well celtic art is much appreciated by people with downsyndrome or with other mental dissabilities, this is the reason. Celtic art is a peace of poo
Some Celtic words meaning loyal include dílis (Irish), degemer (Breton), and delweddol (Welsh).
Some words for 'colorful' in the Irish: dathannach, ildaite. in Scottish Gaelic it's dathach Welsh: lliwgar Breton: ?
Pax
Irish Gaelic: luaithScots Gaelic: luathWelsh: lludw or ulw(Not words for 'ash tree')
Irish: craiceann Scots Gaelic: craiceann, sgrath Welsh: croen
Irish: Scots Gaelic: Manx: Welsh: teulu Breton: Cornish:
Irish Gaelic: tarbh Scots Gaelic: tarbh Welsh: tarw
Irish Gaelic: coinín Scots Gaelic: coineanach Welsh: cwningen