1475-85;acknowleche, apparently either Middle Englishaknou(en) to recognize (Old Englishoncnāwan; see a-1, know) + -leche noun suffix (Old English*-lǣce, by-form of -lac; cf. knowledge, wedlock); or blend of aknouen and knoulecheknowledge; then a- was mistaken for ac-
preacknowledge, verb (used with object), preacknowledged, preacknowledging.
reacknowledge, verb (used with object), reacknowledged, reacknowledging.
1. concede, confess, grant. Acknowledge, admit, confess agree in the idea of declaring something to be true. Acknowledge implies making a statement reluctantly, often about something previously denied: to acknowledge a fault. Admit especially implies acknowledging something under pressure: to admit a charge. Confess usually means stating somewhat formally an admission of wrongdoing, crime, or shortcoming: to confess guilt; to confess an inability to understand.
1550s, a blend of M.E. aknow (from O.E. oncnawan "understand," from on + cnawan "recognize;" see know) and M.E. verb knowlechen "admit." Somehow, in the merger, a parasitic -c- slipped in, so that, while the kn- became a simple "n" sound (as in know), the -c- stepped up to preserve, in this word, the ancient "kn-" sound.