centennially

English

Etymology

Etymology tree

Latin centennis

Proto-Indo-European *-(i)yós

Proto-Italic *-ijos

Proto-Italic *-ios

Old Latin -ios

Latin -iusnom.

Latin -ium

Late Latin centennium

Proto-Indo-European *h₂el-

Proto-Indo-European *-is

Proto-Indo-European *h₂élisder.?

Proto-Italic *-ālis

Latin -ālislbor.

Old French -albor.

▲

Latin -ālis

Old French -elbor.

▲

Latin -ālisbor.

Middle English -al

English -al

English centennial

Proto-Indo-European *leyg-der.

Proto-Germanic *līkąder.

Proto-Germanic *-līkaz

Proto-Germanic *-ê

Proto-Germanic *-līkê

Proto-West Germanic *-līkē

Old English -līċe

Middle English -ly

English -ly

English centennially

From centennial + -ly.

Adverb

centennially (not comparable)

1. As part of a centennial.
2. once a century, every one hundred years