Английский разговорный словарь (основной) - ad-

prefix (also abefore sc, sp, st, acbefore c, k, q, afbefore f, agbefore g, albefore l, anbefore n, apbefore p, arbefore r, asbefore s, atbefore t) 1 with the sense of motion or direction to, reduction or change into, addition, adherence, increase, or intensification. 2 formed by assimilation of other prefixes (accurse; admiral; advance; affray). [(sense 1) (through OF a-) f. L ad to: (sense 2) arepr. various prefixes other than ad-]