(Greek: up, upward; back, backward, against; again, anew; used as a prefix)

(Greek: again; occurring in some rhetorical terms)

(Latin: again; to do over a second time, to repeat, to say again)

(Greek > Latin: recurrence, repetitious; back, backward, again; returning, repeating)

(Latin: back, backward, again; used as a prefix)

(a danger to both young and old)

(Latin: to chew over again, to chew the cud; to muse or to meditate; that is, to think about something in a deep and serious or dreamy and abstracted way or to think about something carefully, calmly, seriously, and for some time)

(animated and audio horses in which each horse sings when you click on it, or quits singing, when you click on it again)

(Latin: to beat, to strike; to drive, to force back; from verber, whip, lash, rod; by extension, to make sounds or noises or those sounds and echoes that are thrown back again or repeatedly)