adverb

1. Rare back in response; in return answer again
2. back into a former position or condition he is well again
3. once more; anew try again
4. besides; further again, we should note
5. on the other hand; from the contrary standpoint he may, and then again he may not
6. Obsolete in the opposite direction; back

Etymology: ME agen, ayein < OE ongegn, ongean < on-, up to, toward + gegn, direct: orig. separable prefix meaning “directly up to,” hence, “facing, opposite”