adhart

I.

pillow, so Irish, Early Irish adart: ad-art; art, stone? See airtein.

II.

adhart, aghart

"progress" (Dict.). This is a ghost-word, made from the adverbial phrase air adhart, which in Middle Irish is araird, forward, bring forward; in Old Irish arairt, prorsum. Hence it is air+ àrd, q.v.