"Celtic" is a word in ENGLISH

Befitting an athlete; strong; muscular; robust; vigorous; as, athletic Celts.

A professional poet and singer, as among the ancient Celts, whose occupation was to compose and sing verses in honor …

A festival of the heathen Celts on the first day of May, in the observance of which great bonfires were …

One of an ancient race of people, who formerly inhabited a great part of Central and Western Europe, and whose …

A weapon or implement of stone or metal, found in the tumuli, or barrows, of the early Celtic nations.

Of or pertaining to the ancient Celtiberia (a district in Spain lying between the Ebro and the Tagus) or its …

A custom of the Celts, or an idiom of their language.

To render Celtic; to assimilate to the Celts.

A monument of rough stones composed of one or more large ones supported in a horizontal position upon others. They …

In the clvll law. Guile; de-celtfulness; malicious fraud. A fraudulent address or trick used to deceive some one; a fraud. …

A Celt or the Celts of the Scotch Highlands or of Ireland; now esp., a Scotch Highlander of Celtic origin.

Same as Celt, one of Celtic race.

In old Engllsh law. A false oath; perjury. Cowell. Probably from Sax. “manath" or “mainath” a false or de-celtful oath

One of an ancient German tribe; later, a name applied to any member of the Germanic race in Europe; now …

A monument consisting of three stones; especially, such a monument forming a kind of doorway, as among the ancient Celts.