אח"ס, אח"ס בט"ע, a formula representing a permutation of letters wherein the first (א) interchanges with the eighth (ח) and with the fifteenth (ס); the second (ב) with the ninth (ט) and with the sixteenth (ע), &c. Sabb. 104ᵃ אח"ס בט"ע גי"ף = א̇ני ח̇ס̇ עליהם מפני שב̇ע̇ט̇ו בג̇י̇ף̇ I shall spare them because they resisted sensual temptations; v. גִּיף