What's the "een" in Halloween?
1704 (implied in imbricated), from Latin imbricatus "covered with tiles," past participle of imbricare "to cover with rain tiles" (see imbrication). As an adjective from 1650s. Related: Imbricated; imbricating.
imbricate im·bri·cate (ĭm'brĭ-kāt') or im·bri·cat·ed (ĭm'brĭ-kā'tĭd)
Having the edges overlapping in a regular arrangement like roof tiles or the scales of a fish.